Removed IBPDatasource.properties - it was required in old scheme of central/local DB context switching based on property file rewrites. No longer needed anymore.

Issue: GCP-9697
Removed test-hibernate.cfg.xml. Need to avoid such duplication of hibernate configuration for testing.
Moving test classes into the respective packages of the classes they test.
Renamed all test classes to follow the standard test naming convention. ClassA's test is named ClassATest. More test classes moved to the package of the class they test.