Merge pull request #8043 from john-westcott-iv/instance_groups_module

Adding tower_instance_group module

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

awx_collection/plugins/module_utils/tower_api.py

@@ -110,6 +110,8 @@ class TowerAPIModule(TowerModule):
         name_field = 'name'
         if endpoint == 'users':
             name_field = 'username'
+        elif endpoint == 'instances':
+            name_field = 'hostname'
 
         query_params = {'or__{0}'.format(name_field): name_or_id}
         try: