Add network tags to test_quotas_negative

Partially implements bp add-service-tags

Change-Id: I37af14a34fa968874b4887616eaf8540f20fe7c1
diff --git a/tempest/api/compute/admin/test_quotas_negative.py b/tempest/api/compute/admin/test_quotas_negative.py
index f147b9c..aa91761 100644
--- a/tempest/api/compute/admin/test_quotas_negative.py
+++ b/tempest/api/compute/admin/test_quotas_negative.py
@@ -94,6 +94,7 @@
     @test.skip_because(bug="1186354",
                        condition=CONF.service_available.neutron)
     @test.attr(type='gate')
+    @test.services('network')
     def test_security_groups_exceed_limit(self):
         # Negative test: Creation Security Groups over limit should FAIL
 
@@ -118,6 +119,7 @@
     @test.skip_because(bug="1186354",
                        condition=CONF.service_available.neutron)
     @test.attr(type=['negative', 'gate'])
+    @test.services('network')
     def test_security_groups_rules_exceed_limit(self):
         # Negative test: Creation of Security Group Rules should FAIL
         # when we reach limit maxSecurityGroupRules