HSEARCH-1622 Improve error report for infinite depth loops and add test
HSEARCH-1625 Upgrade H2 version to 1.4.178
HSEARCH-1623 Replace WeakIdentityHashMap with a threadsafe alternative
HSEARCH-1623 Test for threadsafety of parallel write operations out of transaction
HSEARCH-1626 Upgrade JGroups to 3.5.0.Beta9
HSEARCH-1628 Missing version of Maven plugins for docbook and asciidoc
HSEARCH-1628 Update maven-checkstyle-plugin to 2.12.1
HSEARCH-1627 Improve debugging options of Karaf features file
HSEARCH-1630 Update to Hibernate Commons Annotations 4.0.5.Final