fix Issue #119
Merge pull request #120 from maczpc/master

fix Issue #119 (Exception in thread "TriggerRunnerManager-Trigger-Scanner-Thread" java.lang.IllegalMonitorStateException)
Merge branch 'master' of github.com:azkaban/azkaban2
added test case to mimick the deadlock that happened when
TriggerScannerThread is processing all triggers, some of them try to
insert new triggers, and another thread also tries to insert trigger
into the system