Add server_group in default_quota_set

Items about server_group is missing in default_quota_set, this is
to add them.

see http://developer.openstack.org/api-ref/compute/?expanded=list-servers-detail,list-images-with-details-detail,show-a-quota-detail#show-a-quota

Change-Id: I974bcc3ba324b8806567f458e5708273ba34b150
diff --git a/tempest/api/compute/test_quotas.py b/tempest/api/compute/test_quotas.py
index 122e7cc..b9e0c35 100644
--- a/tempest/api/compute/test_quotas.py
+++ b/tempest/api/compute/test_quotas.py
@@ -48,7 +48,8 @@
                                      'fixed_ips', 'key_pairs',
                                      'injected_file_path_bytes',
                                      'instances', 'security_group_rules',
-                                     'cores', 'security_groups'))
+                                     'cores', 'security_groups',
+                                     'server_group_members', 'server_groups'))
 
     @test.idempotent_id('f1ef0a97-dbbb-4cca-adc5-c9fbc4f76107')
     def test_get_quotas(self):