[artifactory-release] Release version 3.0.0.RC1
Updated Spring Data versions for Spring I/O
BATCH-2232: Fixed generics for RepositoryItemReader#setRepository
Update configuration of Spring IO plugin

This commit updates the configuration of the IO plugin to use an
external property, platformVersion, and to only apply the plugin when
this property is set. This removes the declaration of a snapshot
dependency from the normal build configuration and also breaks a
circular dependency between the projects that are in the Platform and
the Platform itself.

The commit also applies the configuration that was applied to the
standard test task, other than code coverage, to the new test tasks
that are created by the Spring IO plugin.

Two redundant Hibernate mapping files have been deleted. With more
recent versions of Hibernate the presence of these files was causing
test failures due to duplicate mappings.
BATCH-2233: Moved JsrTestUtils to a location that is actually published with the release
BATCH-2234: Updated documentation to outline setup requirements as well as adding batch-*.properties files for the other database types
Renamed JobExplorer#getJobInstancesByName to JobExplorer#findJobInstancesByName
options.encoding='UTF-8'
BATCH-2237: Added missing column to schema needed for JSR-352 based jobs
Updated spring versions to match Spring I/O releases
BATCH-2212: Updated CommandLineJobRunner to better communicate exceptions
Handle TestContext class to interface conversion from Spring 3 to Spring 4

Use reflection to make calls to the provided TestContext in StepScopeTestExecutionListener
Enables usage of Spring 4 w/ Batch 2.2 (in this case)
Added Serializable check so exception handling is consistent across 2.2.x and 3.0
Allow multiple configs (xmls, java-files, packages) to be loaded in
ApplicationContextFactory
Added tests to address more situations as well as cleaned up logic a bit
BATCH-2235: Updated ExitStatus#isRunning logic to use correct strings
BATCH-2206: Added option to set collection for MongoItemReader
Updated Spring Integration version to 4.0.1