Update GMM service usage to support tectonic setting

Add "setting" field to GMM and group response object/members.

changed milestone to %GMM Sprint

added GMM Services labels

mentioned in issue nshmp-apps#211 (closed)

added To Do label

assigned to @bclayton

added In Progress label and removed To Do label

added To Do label and removed In Progress label

mentioned in merge request !221 (merged)

added In Progress label and removed To Do label

mentioned in commit 04b4804e

closed with merge request !221 (merged)

removed In Progress label