Author: David Mudrak
MDL-31832 CLI upgrade checks if the upgrade is actually needed
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1acc431b98c150c7c4f3754b1ae91f71d3b8e021
http://github.com/moodle/moodle/commit/1acc431b98c150c7c4f3754b1ae91f71d3b8e021
+ 2.2 en [cliupgradenoneed,core_admin]