INT-3208 Create 4.0 Schemas

Update the spring.schemas files.

JIRA: https://jira.springsource.org/browse/INT-3208

The following is a diff showing changes between the 3.0 and 4.0 schemas...
````
./spring-integration-amqp/src/main/resources/org/springframework/integration/amqp/config/spring-integration-amqp-3.0.xsd
12c12
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-core/src/main/resources/org/springframework/integration/config/xml/spring-integration-3.0.xsd
./spring-integration-event/src/main/resources/org/springframework/integration/event/config/spring-integration-event-3.0.xsd
11c11
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-feed/src/main/resources/org/springframework/integration/feed/config/spring-integration-feed-3.0.xsd
12c12
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-file/src/main/resources/org/springframework/integration/file/config/spring-integration-file-3.0.xsd
13c13
<                 schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
>                 schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-ftp/src/main/resources/org/springframework/integration/ftp/config/spring-integration-ftp-3.0.xsd
13c13
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
15c15
< 		schemaLocation="http://www.springframework.org/schema/integration/file/spring-integration-file-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/file/spring-integration-file-4.0.xsd" />
./spring-integration-gemfire/src/main/resources/org/springframework/integration/gemfire/config/xml/spring-integration-gemfire-3.0.xsd
./spring-integration-groovy/src/main/resources/org/springframework/integration/groovy/config/spring-integration-groovy-3.0.xsd
10c10
< 		schemaLocation="http://www.springframework.org/schema/integration/scripting/spring-integration-scripting-core-3.0.xsd"
---
> 		schemaLocation="http://www.springframework.org/schema/integration/scripting/spring-integration-scripting-core-4.0.xsd"
13c13
< 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-http/src/main/resources/org/springframework/integration/http/config/spring-integration-http-3.0.xsd
11c11
< 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-ip/src/main/resources/org/springframework/integration/ip/config/spring-integration-ip-3.0.xsd
12c12
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-jdbc/src/main/resources/org/springframework/integration/jdbc/config/spring-integration-jdbc-3.0.xsd
9c9
< 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-jms/src/main/resources/org/springframework/integration/jms/config/spring-integration-jms-3.0.xsd
14c14
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-jmx/src/main/resources/org/springframework/integration/jmx/config/spring-integration-jmx-3.0.xsd
9c9
< 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 	<xsd:import namespace="http://www.springframework.org/schema/integration" schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-jpa/src/main/resources/org/springframework/integration/jpa/config/xml/spring-integration-jpa-3.0.xsd
12c12
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-mail/src/main/resources/org/springframework/integration/mail/config/spring-integration-mail-3.0.xsd
14c14
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-mongodb/src/main/resources/org/springframework/integration/mongodb/config/spring-integration-mongodb-3.0.xsd
11c11
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-redis/src/main/resources/org/springframework/integration/redis/config/spring-integration-redis-3.0.xsd
11c11
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-rmi/src/main/resources/org/springframework/integration/rmi/config/spring-integration-rmi-3.0.xsd
14c14
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-scripting/src/main/resources/org/springframework/integration/scripting/config/spring-integration-scripting-3.0.xsd
8c8
< 		schemaLocation="http://www.springframework.org/schema/integration/scripting/spring-integration-scripting-core-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/scripting/spring-integration-scripting-core-4.0.xsd" />
./spring-integration-scripting/src/main/resources/org/springframework/integration/scripting/config/spring-integration-scripting-core-3.0.xsd
11c11
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
./spring-integration-security/src/main/resources/org/springframework/integration/security/config/spring-integration-security-3.0.xsd
./spring-integration-sftp/src/main/resources/org/springframework/integration/sftp/config/spring-integration-sftp-3.0.xsd
13c13
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
15c15
< 		schemaLocation="http://www.springframework.org/schema/integration/file/spring-integration-file-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/file/spring-integration-file-4.0.xsd" />
./spring-integration-stream/src/main/resources/org/springframework/integration/stream/config/spring-integration-stream-3.0.xsd
14c14
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-syslog/src/main/resources/org/springframework/integration/syslog/config/spring-integration-syslog-3.0.xsd
13c13
< 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd" />
15c15
< 		schemaLocation="http://www.springframework.org/schema/integration/ip/spring-integration-ip-3.0.xsd" />
---
> 		schemaLocation="http://www.springframework.org/schema/integration/ip/spring-integration-ip-4.0.xsd" />
./spring-integration-twitter/src/main/resources/org/springframework/integration/twitter/config/spring-integration-twitter-3.0.xsd
14c14
< 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-ws/src/main/resources/org/springframework/integration/ws/config/spring-integration-ws-3.0.xsd
14c14
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-xml/src/main/resources/org/springframework/integration/xml/config/spring-integration-xml-3.0.xsd
13c13
< 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 			schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
./spring-integration-xmpp/src/main/resources/org/springframework/integration/xmpp/config/spring-integration-xmpp-3.0.xsd
14c14
< 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-3.0.xsd"/>
---
> 				schemaLocation="http://www.springframework.org/schema/integration/spring-integration-4.0.xsd"/>
````