Fix some pep8 error

Change-Id: I805bed4b74a9ea94d38fc9c197920d4fb0377139

solumclient/common/apiclient/fake_client.py

@@ -91,8 +91,8 @@ class FakeHTTPClient(client.HTTPClient):
         """Assert than an API method was just called."""
         expected = (method, url)
         called = self.callstack[pos][0:2]
-        assert (self.callstack,
-                "Expected %s %s but no calls were made." % expected)
+        assert self.callstack, \
+            "Expected %s %s but no calls were made." % expected
 
         assert expected == called, 'Expected %s %s; got %s %s' % (
             expected + called)
@@ -106,8 +106,8 @@ class FakeHTTPClient(client.HTTPClient):
         """Assert than an API method was called anytime in the test."""
         expected = (method, url)
 
-        assert (self.callstack,
-                "Expected %s %s but no calls were made." % expected)
+        assert self.callstack, \
+            "Expected %s %s but no calls were made." % expected
 
         found = False
         entry = None

solumclient/common/auth.py

@@ -186,7 +186,7 @@ class KeystoneAuthPlugin(auth.BaseAuthPlugin):
 
             # retrieve session
             ks_session = _get_keystone_session(**ks_kwargs)
-            token = lambda: ks_session.get_token()
+            token = ks_session.get_token()
             endpoint = (self.opts.get('endpoint') or
                         _get_endpoint(ks_session, **ks_kwargs))
         self.opts['token'] = token

solumclient/tests/v1/test_plan.py

@@ -172,7 +172,7 @@ class PlanManagerTest(base.TestCase):
     def test_plan_create_post_success(self):
         api_client = mock.MagicMock()
         dummy_data = 'version: 1\nname: ex_plan1\ndescription: dsc1.'
-        response = lambda: None
+        response = mock.MagicMock()
         setattr(response, 'content', dummy_data)
         api_client.post.return_value = response
         try: