XD-902: Properly close redis connection factory in tests
XD-900 Phase I

PropertyAccessors are now inheritable.

PropertyAccessors provided to the IntegrationEvaluationContextFactoryBean
are now named, to enable normal bean inheritance/override semantics.

This commit changes spel-context.xml to configure a Map instead of a List
of accessors.

Phase II will elevate the factory bean to the parent (module common)
context.
XD-899 container startup without admin

- Use lazyConnectionDataSourceProxy as dataSource for batch
- Added custom JobRepositoryFactoryBean to use this dataSource
Fix some generics warnings, add javadoc
XD-847 Revise the available hadoopDistro options

Available options now are hadoop12 (default), cdh4, hdp13, phd1, hadoop20