CLC-2549 CCNs appearing as four-digit numbers -
Change converts CCNs to length five in the backend
Updated spec and dummy json
Changed canvas section ccn comparison to integer comparison
Merge remote-tracking branch 'ets/master' into CLC-2549
CLC-2828 Modified tests to test bCourses integration and using integer comparison of section CCNs makes them pass.
Merge pull request #1896 from anair13/CLC-2549

CLC-2549 CCNs appearing as four-digit numbers
CLC-2372 - Build instructor "add user to Canvas course" feature
Merge pull request #1903 from redconfetti/CLC-2372-instructor-add-user

CLC-2372 - Build instructor "add user to Canvas course" feature