Disable Master failback in Galera Monitor

Disable Master failback in Galera Monitor
Added 'disable_master_failback' monitor option

Added 'disable_master_failback' option in Galera monitor
Merge branch 'develop' into MAX-316
Added Master Failback in show monitors

Added Master Failback in show monitors
Fix to bug #609, http://bugs.mariadb.com/show_bug.cgi?id=609
If target can't be resolved, master is chosen. Bug cause master be chosen in most of the cases.
Fix two other incorrect pointers, changing bitmask to bitmask->bits.
Fixes to some Coverity issues.
Added comment to server selection routine
Merge branch 'develop' of https://github.com/mariadb-corporation/MaxScale into develop
Fixes to coverity bugs:
72670: query_classifier/query_classifier.cc
72682: server/modules/filter/qlafilter.c
72679: server/modules/filter/tee.c
72716: server/modules/protocol/maxscaled.c
72694: server/modules/protocol/telnetd.c
71743: server/modules/routing/readwritesplit/readwritesplit.c
Merge branch 'develop' of https://github.com/mariadb-corporation/MaxScale into develop
Fix to bug #610, http://bugs.mariadb.com/show_bug.cgi?id=610
Fixes to Coverity issues 72728, 72755, 72745
Merge branch 'develop' of https://github.com/mariadb-corporation/MaxScale into develop
Fix to Coverity issue 72738, passed NULL-pointer to a function which referenced it.
Merge branch 'develop' into firewall
Fix to Coverity issue 72749, replaced sprintf with snprintf
Fix to Coverity issue 72741
Fix to Coverity issue 72726
Fix to Coverity issue 72769
Fix bug #611, http://bugs.mariadb.com/show_bug.cgi?id=611
Fixes to Coverity issues 72703, 72713, 72718, 72721