Bug 1863511: Course completion (courseinfo) block

This block allows one to import information from an external source
It requires the connection via webservices to
1) find out the external user id value based on the page owner's email address
2) fetch the course completion data for that external user id

Change-Id: I6c67feb470bbcb35b0c549a8467c9204a00c9389
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>