Fix incorrect mock usage

test_configure_global_cluster() is using 'has_calls',
but that does not exist in the unittest.mock library.
Use 'assert_has_calls' as eventually this will cause
a test error.

Change-Id: Ica1fa7daaf6c90d988805c33352d3e4246af080d

unit_tests/test_hacluster_utils.py

@@ -1077,7 +1077,7 @@ def test_configure_resources_on_remotes_unknown(
     @mock.patch('pcmk.commit')
     def test_configure_global_cluster(self, mock_commit):
         utils.configure_cluster_global(240, 120)
-        mock_commit.has_calls([
+        mock_commit.assert_has_calls([
             mock.call('crm configure property no-quorum-policy=stop'),
             mock.call('crm configure rsc_defaults $id="rsc-options" '
                       'resource-stickiness="100" failure-timeout=240'),