Upgrade the support for Open Badges 2 to support a real open badges 2 backpack.
Moodle can only talk to one backpack at a time, so after switching backpacks, users
will have to manually disconnect and then reconnect their backpack to the new one.
This commit combines several changes:
* Split classes into badges namespace
* Publish expiry data with a badge
* Publish badge alignments in badges exported to the backpack.
* Export the criteria for a badge to the backpack.
While strictly we don't nedd to provide an upgrade path for master,
any dev/integration site already using some of the 3.7 new tagets
in models will break (class rename/move) if we don't perform the
update of all them.
This commit takes rid of the previous upgrade step, only performing
the update of a couple of targets and now supports all the (5) targets:
- course_dropout
- course_competencies
- course_completion
- course_gradetopass
- no_teaching
Added new MESSAGE_CONVERSATION_TYPE_SELF type for self-conversations
and upgraded legacy self-conversations to the new type, removing
repeated members in the message_conversation_members table.
Besides, from now, a self-conversation will be created by default for
all the existing users.
All the self-conversations have been also starred and a default message
will be displayed always to explain how to use them.
Eloy Lafuente (stronk7)