Fix up unit tests

unit_tests/utilities/test_zaza_utilities_openstack.py

@@ -581,17 +581,23 @@ class TestOpenStackUtils(ut_utils.BaseTestCase):
         nova_mock.keypairs.create.assert_called_once_with(name='mykeys')
 
     def test_get_private_key_file(self):
+        self.patch_object(openstack_utils.deployment_env, 'get_tmpdir',
+                          return_value=False)
+        self.get_tmpdir.return_value = '/tmp/zaza-model1'
         self.assertEqual(
             openstack_utils.get_private_key_file('mykeys'),
-            'tests/id_rsa_mykeys')
+            '/tmp/zaza-model1/id_rsa_mykeys')
 
     def test_write_private_key(self):
+        self.patch_object(openstack_utils.deployment_env, 'get_tmpdir',
+                          return_value=False)
+        self.get_tmpdir.return_value = '/tmp/zaza-model1'
         m = mock.mock_open()
         with mock.patch(
             'zaza.openstack.utilities.openstack.open', m, create=False
         ):
             openstack_utils.write_private_key('mykeys', 'keycontents')
-        m.assert_called_once_with('tests/id_rsa_mykeys', 'w')
+        m.assert_called_once_with('/tmp/zaza-model1/id_rsa_mykeys', 'w')
         handle = m()
         handle.write.assert_called_once_with('keycontents')