FWaaS OSC plugin: Use python logging instead of oslo.log

CLI implementation including OSC and neutorn CLI does not consume
oslo.log and use python logging directly. At now oslo.log is not
included in requirements.txt of both OSC and neutronclient and
CLI does not use features provided by oslo.log.
Let's use python logging.

Change-Id: I81e943fb87567f0e01635888bebf875ea42a4d02
Closes-Bug: #1676295

neutronclient/osc/v2/fwaas/firewallgroup.py

@@ -12,12 +12,12 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-#
+
+import logging
 
 from osc_lib.command import command
 from osc_lib import exceptions
 from osc_lib import utils
-from oslo_log import log as logging
 
 from neutronclient._i18n import _
 from neutronclient.osc import utils as osc_utils

neutronclient/osc/v2/fwaas/firewallpolicy.py

@@ -16,10 +16,11 @@
 
 from __future__ import print_function
 
+import logging
+
 from osc_lib.command import command
 from osc_lib import exceptions
 from osc_lib import utils
-from oslo_log import log as logging
 
 from neutronclient._i18n import _
 from neutronclient.osc import utils as osc_utils

neutronclient/osc/v2/fwaas/firewallrule.py

@@ -14,11 +14,11 @@
 #    under the License.
 #
 import copy
+import logging
 
 from osc_lib.command import command
 from osc_lib import exceptions
 from osc_lib import utils
-from oslo_log import log as logging
 
 from neutronclient._i18n import _
 from neutronclient.common import utils as nc_utils