XD-1839: Named channels only allowed in full streams
short-circuit -> direct binding
only set the direct binding property if not explicitly provided
XD-1885: Introduce 'hidden' options
XD-1463 Delete post module and CF profile
XD-1463 Changes on merge

- Remove `cloud` profile from XdProfiles
- Remove `cloud` namespace references in modules xml
- Remove `springCloud` jars from DIRT dependency
XD-1884 Added type validation to SimpleModuleModuleOptionsMetadata

XD-1884 added unit test and changes per review

XD-1884 validate default option value
XD-1299: Remove --deleteFiles from hdfsjdbc

Fix filejdbc, add javadoc
Fix Gemfire script
Instructions cover local cluster deployment
XD-1863 Adding empty custom-modules.zip for XD on YARN

- provides a way to add custom modules as part of YARN deployment
remove hadoop in xd-admin
XD-1900 Fix JobDeploymentModulesPath

- Fix the JobDeploymentsPath when the `DeploymentSupervisor` recalculates the states of deployed jobs
Multi container testing module

Introduction of Spring XD multi container tests under the module:

  spring-xd-distributed-test

External JVM launch support provided by the Oracle Tools framework:

  https://java.net/projects/oracletools

Since these tests have the potential to add multiple minutes to the
build, they are not enabled by default. Include the following system
property command to include distributed test execution:

  -Drun_distributed_tests=true
XD-1899: IllegalStateException on single node shutdown

When the application context is shut down, the cache
will also be shut down (similar to DeploymentSupervisor).
XD-1703 Add admin and container memory settings
XD-1684 JBoss HornetQ Infrastructure (JMS Source)

JIRA: https://jira.spring.io/browse/XD-1684

Infrastructure files for JBoss HornetQ.

Note: Due to a gradle issue, we cannot automatically
pull in hornetq dependencies.
See http://issues.gradle.org//browse/GRADLE-3074
XD-1751 Connection Pool settings for jdbc modules

* Includes common pool settings as well as tomcat enhanced attributes
* Initial size is set to zero vs. the default of 10.
* Jdbc Unit has a test for testOnBorrow setting.
* hdfsjdbc, jdbchdfs & filejdbc testing will be covered by acceptance tests
* Code Polishing

Jdbc Connection pool settings now set via yml

Originally the PR used JDBCConnectionPoolMixin in order to set the connection pool settings.  However this proved to be a bit overwhelming for users when trying to setup a jdbchdfs, hdfsjdbc,filejdbc or filesink.
Now the pool setting will be setup via a servers.yml and application.yml

Connection test for shell was removed.

No longer valid, because settings will be established via the .yml files.

Conn Pool Config consolidated to one location in yaml

* Servers.yml
* application.yml

JdbcConnectionPool metadata is now available.

1) Add key datasource and pool variables in servers.yml
2) Add commented out section of datasource and pool variables in modules.yml as an easy way to customize the datasource used for modules but not for the XD infrastructure
3) For any modules that use jdbc functionality, add something like maxIdle = ${spring.datasource.maxIdle} into that module/job property file.
4) investigated to see if there was a way to inject a common snippet of connection pool xml into jdbc.xml, hdfsjdbc.xml, jdbchdfs.xml & filejdbc.  There was no smooth way to do this.

Jdbc Conn Pool autocomplete options are hidden.
XD-1869: Expose mapped(Request|Response)Headers

Also fixed missing bean factory in Redis Bus (grussell).
XD-1768 User should be able to specify deploy properties for Jobs

XD-1768 Code Review Changes

XD-1768 Polishing and Rebased with MASTER