Switch to oslo_log

Designate dashboard is currently using python logging module to
implement logging functionality.
This patch made a switch to oslo.log(logging for openstack projects)

Reference:-
http://docs.openstack.org/developer/oslo.log

Change-Id: I31b8398e45743a9f797882988d62d779edb89f86
Closes-Bug: #1656167

designatedashboard/api/designate.py

@@ -20,9 +20,9 @@ from designateclient.v1.records import Record  # noqa
 from django.conf import settings  # noqa
 
 from horizon import exceptions
-import logging
 
 from openstack_dashboard.api.base import url_for  # noqa
+from oslo_log import log as logging
 
 LOG = logging.getLogger(__name__)
 

designatedashboard/api/rest/passthrough.py

@@ -16,7 +16,6 @@
 from django.conf import settings
 from django.views import generic
 import functools
-import logging
 import requests
 from requests.exceptions import HTTPError
 
@@ -24,6 +23,7 @@ from horizon import exceptions
 from openstack_dashboard.api import base
 from openstack_dashboard.api.rest import urls
 from openstack_dashboard.api.rest import utils as rest_utils
+from oslo_log import log as logging
 
 LOG = logging.getLogger(__name__)
 

designatedashboard/dashboards/project/dns_domains/forms.py

@@ -12,7 +12,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 import functools
-import logging
 import re
 
 from designateclient import exceptions as designate_exceptions
@@ -27,6 +26,7 @@ from horizon import messages
 from designatedashboard import api
 from designatedashboard.dashboards.project.dns_domains.utils\
     import limit_records_to_fips
+from oslo_log import log as logging
 
 
 LOG = logging.getLogger(__name__)

designatedashboard/dashboards/project/dns_domains/tables.py

@@ -11,8 +11,6 @@
 # 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 django.core import urlresolvers
 from django.utils.translation import ugettext_lazy as _  # noqa
 
@@ -23,6 +21,7 @@ from horizon.utils import memoized
 from designatedashboard import api
 
 from openstack_dashboard import policy
+from oslo_log import log as logging
 
 LOG = logging.getLogger(__name__)
 

requirements.txt

@@ -1,6 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
+oslo.log>=3.11.0 # Apache-2.0
 pbr>=1.8 # Apache-2.0
 Babel>=2.3.4 # BSD
 python-designateclient>=1.5.0 # Apache-2.0