Disable java debugger in the surefire tests

We are having intermittent problems with arquillian tests on the mac that start containers one after the other. It seems that a previous one is slow to shut down causing the next one to fail to start with

    ERROR: transport error 202: bind failed: Address already in use
    JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized

I plan to disable the debugger (I think we enabled it because of a hang on an old issue where we needed the debugger port open to aid diagnosis).