tests: Skip keystoneauth tests if not available

Change-Id: I80af28b49415c5bea6399683922b6649f04ed011

test/unit/test_authv1.py

@@ -16,10 +16,13 @@ import datetime
 import json
 import unittest
 from unittest import mock
+try:
     from keystoneauth1 import plugin
     from keystoneauth1 import loading
     from keystoneauth1 import exceptions
     from swiftclient import authv1
+except ImportError:
+    plugin = loading = exceptions = authv1 = None
 
 
 class TestDataNoAccount:
@@ -44,6 +47,10 @@ class TestDataWithAccount:
 
 
 class TestPluginLoading(TestDataNoAccount, unittest.TestCase):
+    def setUp(self):
+        if authv1 is None:
+            raise unittest.SkipTest('keystoneauth1 is not available')
+
     def test_can_load(self):
         loader = loading.get_plugin_loader('v1password')
         self.assertIsInstance(loader, authv1.PasswordLoader)
@@ -120,6 +127,8 @@ class TestPluginLoadingWithAccount(TestDataWithAccount, TestPluginLoading):
 
 class TestPlugin(TestDataNoAccount, unittest.TestCase):
     def setUp(self):
+        if authv1 is None:
+            raise unittest.SkipTest('keystoneauth1 is not available')
         self.mock_session = mock.MagicMock()
         self.mock_response = self.mock_session.get.return_value
         self.mock_response.status_code = 200

test/unit/test_swiftclient.py

@@ -579,7 +579,10 @@ class TestGetAuth(MockHttpTest):
         self.assertTrue(token)
 
     def test_auth_v3applicationcredential(self):
+        try:
             from keystoneauth1 import exceptions as ksauthexceptions
+        except ImportError:
+            raise unittest.SkipTest('keystoneauth1 is not available')
 
         os_options = {
             "auth_type": "v3applicationcredential",