Ignore lock release errors in the reopen_log_files signal handler.
Ignore lock release errors in the reopen_log_files signal handler.

Failed to release a lock could simply indicate that the lock wasn't acquired
which is not fatal.

pixelrebel/st2,Plexxi/st2,nzlosh/st2,Plexxi/st2,punalpatel/st2,emedvedev/st2,lakshmi-kannan/st2,StackStorm/st2,nzlosh/st2,punalpatel/st2,Plexxi/st2,peak6/st2,lakshmi-kannan/st2,StackStorm/st2,lakshmi-kannan/st2,tonybaloney/st2,emedvedev/st2,Plexxi/st2,StackStorm/st2,emedvedev/st2,peak6/st2,tonybaloney/st2,nzlosh/st2,dennybaa/st2,dennybaa/st2,punalpatel/st2,armab/st2,nzlosh/st2,pixelrebel/st2,armab/st2,armab/st2,tonybaloney/st2,StackStorm/st2,pixelrebel/st2,dennybaa/st2,peak6/st2