Tweak auto group creation stat logger
Tweak auto group creation stat logger

Making the root account id global and adding the account name to the
stat logging. Also, only log if one of the auto create options was
selected.

Test Plan:
 - Specs pass

refs VICE-697

Change-Id: Ia1147536f81a3c1de44c0abb8c7c378f5e214883
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/246719
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Matthew Lemon <7bd6faf60934a850234395b3b97cb1fc9250fa11@instructure.com>
QA-Review: Matthew Lemon <7bd6faf60934a850234395b3b97cb1fc9250fa11@instructure.com>
Product-Review: Matthew Lemon <7bd6faf60934a850234395b3b97cb1fc9250fa11@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms