JCR-3783: Deadlock due to IOException in WorkspaceUpdateChannel.updatePrepared()
JCR-3784: ReplacePropertyWhileOthersReadTest fails when run with ConcurrentTestSuite

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/branches/2.6@1601572 13f79535-47bb-0310-9956-ffa450edef68