Identity groups

Create and maintain groups used to organize identities.

Operation	Request
Query Face Groups	GET /api/v1/face-directory/groups
List Face Groups	GET /api/v1/face-groups
Create Face Group	POST /api/v1/face-groups
Get Face Group	GET /api/v1/face-groups/{groupId}
Replace Face Group	PUT /api/v1/face-groups/{groupId}
Delete Face Group	DELETE /api/v1/face-groups/{groupId}