Unify the oslo_log import usage

In watcher project, some py file use "from oslo_log import log as logging"
for import, but more use "from oslo_log import log"
like https://github.com/openstack/watcher/blob/master/watcher/decision_engine/strategy/strategies/dummy_strategy.py#L19
this patch to unify it.

Change-Id: I9c667bb202bebc7942d1af5ce438375285c2e2ba

watcher/cmd/api.py

@@ -20,13 +20,13 @@
 import sys
 
 from oslo_config import cfg
-from oslo_log import log as logging
+from oslo_log import log
 
 from watcher.api import scheduling
 from watcher.common import service
 from watcher import conf
 
-LOG = logging.getLogger(__name__)
+LOG = log.getLogger(__name__)
 CONF = conf.CONF
 
 

watcher/cmd/applier.py

@@ -20,14 +20,14 @@
 import os
 import sys
 
-from oslo_log import log as logging
+from oslo_log import log
 
 from watcher.applier import manager
 from watcher.applier import sync
 from watcher.common import service as watcher_service
 from watcher import conf
 
-LOG = logging.getLogger(__name__)
+LOG = log.getLogger(__name__)
 CONF = conf.CONF
 
 

watcher/cmd/decisionengine.py

@@ -20,7 +20,7 @@
 import os
 import sys
 
-from oslo_log import log as logging
+from oslo_log import log
 
 from watcher.common import service as watcher_service
 from watcher import conf
@@ -29,7 +29,7 @@ from watcher.decision_engine import manager
 from watcher.decision_engine import scheduling
 from watcher.decision_engine import sync
 
-LOG = logging.getLogger(__name__)
+LOG = log.getLogger(__name__)
 CONF = conf.CONF
 
 

watcher/cmd/sync.py

@@ -20,13 +20,13 @@
 
 import sys
 
-from oslo_log import log as logging
+from oslo_log import log
 
 from watcher.common import service as service
 from watcher import conf
 from watcher.decision_engine import sync
 
-LOG = logging.getLogger(__name__)
+LOG = log.getLogger(__name__)
 CONF = conf.CONF