Author: David Monllao
MDL-41342 admin: Adding warning when upgrading a test site
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c455e8bca5d9462a52d2ab5546adf40cc53333ee
http://github.com/moodle/moodle/commit/c455e8bca5d9462a52d2ab5546adf40cc53333ee
+ 2.5 en [testsiteupgradewarning,core_admin]