TRQ-1500.  In svr_dequejob separated check for pjob and pque after call to get_jobs_queue.
The previous compound preducate made it so the job mutex would still
be locked if pjob was not NULL and pque was NULL. Predicates are now separated.
Added unit tests for mutex_mgr. Also fixed bugs in the
mutex_mgr class exposed by the unit tests.
Merge branch 'master' of https://github.com/actorquedeveloper/torque

Conflicts:
	src/lib/Libutils/Makefile.am
	src/lib/Libutils/test/Makefile.am