HACKING fixes, all but sqlalchemy.

Looks like this fixes all HACKING problems that were around.
Thanks to Dina Belova and Alexander Kovalev for this work.

Change-Id: I8157f0d4890184c1216aab63ef7180ee8b7a184d

nova/rpc/__init__.py

@@ -19,8 +19,7 @@
 
 from nova import flags
 from nova.openstack.common import cfg
-from nova.rpc.common import RemoteError, LOG
-from nova.utils import import_object
+from nova import utils
 
 
 rpc_backend_opt = cfg.StrOpt('rpc_backend',
@@ -199,5 +198,5 @@ def _get_impl():
     """Delay import of rpc_backend until FLAGS are loaded."""
     global _RPCIMPL
     if _RPCIMPL is None:
-        _RPCIMPL = import_object(FLAGS.rpc_backend)
+        _RPCIMPL = utils.import_object(FLAGS.rpc_backend)
     return _RPCIMPL

nova/rpc/amqp.py

@@ -37,8 +37,10 @@ from nova import context
 from nova import exception
 from nova import flags
 from nova import local
+from nova import log as logging
 import nova.rpc.common as rpc_common
-from nova.rpc.common import LOG
+
+LOG = logging.getLogger(__name__)
 
 
 FLAGS = flags.FLAGS

nova/rpc/impl_carrot.py

@@ -43,11 +43,12 @@ from nova import context
 from nova import exception
 from nova import flags
 from nova import local
+from nova import log as logging
 from nova.rpc import common as rpc_common
-from nova.rpc.common import RemoteError, LOG
 from nova.testing import fake
 
 FLAGS = flags.FLAGS
+LOG = logging.getLogger(__name__)
 
 
 class Connection(carrot_connection.BrokerConnection, rpc_common.Connection):
@@ -558,7 +559,7 @@ class MulticallWaiter(object):
         """Acks message and sets result."""
         message.ack()
         if data['failure']:
-            self._results.put(RemoteError(*data['failure']))
+            self._results.put(rpc_common.RemoteError(*data['failure']))
         elif data.get('ending', False):
             self._got_ending = True
         else:

nova/rpc/impl_qpid.py

@@ -26,11 +26,12 @@ import qpid.messaging
 import qpid.messaging.exceptions
 
 from nova import flags
+from nova import log as logging
 from nova.openstack.common import cfg
 from nova.rpc import amqp as rpc_amqp
 from nova.rpc import common as rpc_common
-from nova.rpc.common import LOG
 
+LOG = logging.getLogger(__name__)
 
 qpid_opts = [
     cfg.StrOpt('qpid_hostname',