multithreaded access to odb was implemented back in 2013-2014. but recently a bug surfaced -
there was a race condition in the odb locking code against cm_watchdog(). Somehow this only
affected the mserver for the DRAGON experiment at TRIUMF. This is now fixed on the branch
feature/midas-2017-10. (this branch collects all the code that needs additional testing before
merging into develop and becoming the next release of midas).