Convert security transformers & fix TransformersLogger flushing

 * add reject expression transformers
ignore failing tests
handle cases where target hostname can be null
AS7-6362 Upgrade Infinispan to 5.2.0.CR3
AS7-6363 Upgrade JGroups to 3.2.6.Final
workaround for hacky manual mode tests not cleaning up completely after themselves
manual mode test cleanup
Drop obsolete dependency on org.rhq.helpers:rhq-pluginAnnotations
AS7-4460 TS: speed-up by ignoring the whole test class rather than each @Test
AS7-4460 TS: custom containers wireframe with extension to shutdown containers on AfterSuite
AS7-4460 TS: introduce ClusteringAbstractTestCase and rework tests to leverage cutom containers, cleanup
AS7-2448 TS: use Logger; workaround certain System.out-s not being seen anywhere
AS7-4460 adapt NonHaWebSessionPersistenceTestCase