INT-2945 - StoredProc isFunction Property Not Set

For reference see: https://jira.springsource.org/browse/INT-2945

* ensure that for StoredProcedure Inbound Channel Adapter the *isFunction* property is set
* add test

INT-2945 - Code Review - Add Tests

Conflicts:
	spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/config/StoredProcOutboundGatewayParserTests.java
	spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/config/StoredProcPollingChannelAdapterParserTests.java
	spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/config/storedProcPollingChannelAdapterParserTest.xml