(google linux kernel lockdep dor description)
  1) currently only active if setting NDB_EXTRA_FLAGS=-DNDB_MUTEX_DEADLOCK_DETECTOR
  2) only "monitors" NdbMutex (e.g not mysql mutexes)
  3) only supports basic/simple schemes...i.e not nested locking etc..
     (but we don't use that anyway)

  Found the ndb_mgmd mutex deadlock directly
  When a potential deadlock is detected, code aborts