MDL-42973 fix MUC caching issue when fetching available updates
Merge branch 'mucupdates26' of https://github.com/skodak/moodle into MOODLE_26_STABLE
Merge branch 'MDL-42625_26-failures-fix' of git://github.com/dmonllao/moodle into MOODLE_26_STABLE
MDL-42625 behat: Wrapping select an option extra actions in a try & catch

To select an option is specially painful, every browser
behaves differently and phantomjs just joined the party
throwing "Element does not exist in cache" random
exceptions that we need to catch.
Automatically generated installer lang files
Merge branch 'install_26_STABLE' of git://git.moodle.org/moodle-install into MOODLE_26_STABLE
weekly release 2.6+
MDL-43235 behat: Ensure that behat_config_manager::get_config_file_contents() has always a behat_wwwroot