extract bookmarked_collection gem

fixes: CNVS-11645

Test Plan:

Test the groups api endpoint at

api/v1/users/self/groups?context_type=Account

Make sure its not broken.

Change-Id: I2a17672f0e81530aa8623c5ed16b9cb0bb6b3ce5
Reviewed-on: https://gerrit.instructure.com/31417
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: August Thornton <august@instructure.com>
Reviewed-by: Jacob Fugal <jacob@instructure.com>
Product-Review: Jacob Fugal <jacob@instructure.com>