MDL-43330 behat: Using the tag that includes the exception namespace
MDL-43283 mod_chat: corrected SQL query to follow strict groupping rules
Merge branch 'MDL-43330_master-skippedexception-namespace' of https://github.com/dmonllao/moodle
MDL-43349 cache: added back are_requirements_met calls
Merge branch 'wip-MDL-43283-master' of git://github.com/marinaglancy/moodle
MDL-36721 make upgrade queries cross-db