Skip over quota tests if quota tests disabled

Closes-Bug: 1579759

Change-Id: Ieb36d03788ed516a13954b56d2de3e4a75514185
diff --git a/manila_tempest_tests/tests/api/test_shares_actions_negative.py b/manila_tempest_tests/tests/api/test_shares_actions_negative.py
index 5b50a72..891c491 100644
--- a/manila_tempest_tests/tests/api/test_shares_actions_negative.py
+++ b/manila_tempest_tests/tests/api/test_shares_actions_negative.py
@@ -36,6 +36,9 @@
     @testtools.skipUnless(
         CONF.share.run_extend_tests,
         "Share extend tests are disabled.")
+    @testtools.skipUnless(
+        CONF.share.run_quota_tests,
+        "Quota tests are disabled.")
     def test_share_extend_over_quota(self):
         tenant_quotas = self.shares_client.show_quotas(
             self.shares_client.tenant_id)