first stage of developing an ABBA lock detector

git-svn-id: http://h2database.googlecode.com/svn/trunk@5672 e6896862-9d19-0410-bfb3-e9fa5d50e656
ABBA deadlock detection via code instrumentation

git-svn-id: http://h2database.googlecode.com/svn/trunk@5673 e6896862-9d19-0410-bfb3-e9fa5d50e656