Author: Sara Arjona
MDL-69002 core_badges: add methods to support backpack validation
A more generic method has been added to the API to validate the
backpack connection (for now, there was only one method for
validating current backpack).
Besides, a renderer has been added to display this information
depending on the backpackid.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3a6950ccd73d2421eb5c4e2482e50a1d9cd3ef8f
http://github.com/moodle/moodle/commit/3a6950ccd73d2421eb5c4e2482e50a1d9cd3ef8f
+ 3.8 en [backpackconnectionok,core_badges]
+ 3.8 en [backpackconnectionnottested,core_badges]
+ 3.8 en [testbackpack,core_badges]