Adds test-list-preprocessor support, which loads an optional user specified algorithm(class) from any dependency and uses it to pre-process the list of tests to be run.
Integration test for preprocessor. 2 modules, one provides a preprocessor implementation, the other uses it.
exposed testPreprocessor configuration parameter as a system-property and added an integration-test for the same
exposed testPreprocessor for IntegrationTestMojo as property too