fix pep8 and UT issue

fix latest pep8 and UT issues

Change-Id: I9a3b7f55ec68a9944eb7513fca4c7f521642e49e

neutron-powervc/test/test_PVCRpcCallbacks.py

@@ -1,5 +1,5 @@
 import unittest
-import mox
+import mock
 
 import neutron.db.api as db_api
 from powervc.neutron.api.powervc_rpc import PVCRpcCallbacks
@@ -30,17 +30,9 @@ def dummy():
 class TestSyncInstance(unittest.TestCase):
 
         def setUp(self):
-            # Disable DB init.
-            db_api.get_session = dummy
-            db_api.configure_db = dummy
-            self._db = powervc_db_v2.PowerVCAgentDB()
+            powervc_db_v2.PowerVCAgentDB = mock.MagicMock()
             self._callback = PVCRpcCallbacks(self)
-            # Replace with the dummy DB.
-            self._callback.db = self._db
-            self.moxer = mox.Mox()
-
-        def get_db_api(self):
-            return self._db
+            self._callback.db = mock.MagicMock()
 
         def tearDown(self):
             pass
@@ -59,15 +51,8 @@ class TestSyncInstance(unittest.TestCase):
 
             context = FakeCTX()
 
-            self.moxer.StubOutWithMock(self._db, "get_network")
-            self._db.get_network(local_id=id_in).AndReturn(id_out)
-
-            self.moxer.ReplayAll()
-
+            self._callback.db.get_network = mock.MagicMock(return_value=id_out)
             rtn = self._callback.get_pvc_network_uuid(context, id_in)
 
-            self.moxer.VerifyAll()
-            self.moxer.UnsetStubs()
-
             print str(rtn)
             return rtn

nova-powervc/hostmaintenanceclient/v1_1/host_maintenance.py

@@ -2,8 +2,9 @@
 
 from novaclient import base
 from novaclient import exceptions
-from powervc.common.gettextutils import _
 from novaclient import utils
+from novaclient.openstack.common import cliutils
+from powervc.common.gettextutils import _
 
 
 class HostMaintenanceResource(base.Resource):
@@ -41,18 +42,18 @@ class HostMaintenanceManager(base.Manager):
         return obj
 
 
-@utils.arg('host',
-           metavar='<host>',
-           help='Name of a host.')
-@utils.arg('--set-status', choices=["enable", "disable"],
-           metavar="<enable|disable>",
-           help='To enable or disable the host maintenance mode.')
-@utils.arg('--migrate', choices=["active-only", "all", "none"],
-           metavar="<all|active-only|none>",
-           help='Which kinds of instances to migrate.')
-@utils.arg('--target-host',
-           metavar='<target host>',
-           help='Which service host instances would be migrated to.')
+@cliutils.arg('host',
+              metavar='<host>',
+              help='Name of a host.')
+@cliutils.arg('--set-status', choices=["enable", "disable"],
+              metavar="<enable|disable>",
+              help='To enable or disable the host maintenance mode.')
+@cliutils.arg('--migrate', choices=["active-only", "all", "none"],
+              metavar="<all|active-only|none>",
+              help='Which kinds of instances to migrate.')
+@cliutils.arg('--target-host',
+              metavar='<target host>',
+              help='Which service host instances would be migrated to.')
 def do_host_maintenance(cs, args):
     """Enable maintenance mode for a hypervisor."""
     if not args.set_status:

nova-powervc/test/nova/driver/virt/powervc/test_driver.py

@@ -498,6 +498,7 @@ class PowerVCDriverTestCase(test.NoDBTestCase):
     def test_detach_interface_with_no_local_id_match(self):
         instance = MagicMock()
         detach_instance = pvcIns
+
         def detach_response(pvc_id):
             if pvc_id == 'powervc-port-id-77774'\
                     or pvc_id == 'powervc-port-id-77775':