Correcting import to allow using datetime.timezone.utc

datetime.timezone.utc isn't accessible in case of
'from datetime import datetime'. Switching to
'import datetime'.

Change-Id: I8aa94fcd7e7285187939e940186876023fc48119
Signed-off-by: Ivan Anfimov <lazekteam@gmail.com>

blazar_dashboard/api/client.py

@@ -10,7 +10,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from datetime import datetime
+import datetime
 from datetime import timezone
 from itertools import chain
 import json
@@ -207,6 +207,6 @@ def _parse_api_datestr(datestr):
     if datestr is None:
         return datestr
 
-    dateobj = datetime.strptime(datestr, "%Y-%m-%dT%H:%M:%S.%f")
+    dateobj = datetime.datetime.strptime(datestr, "%Y-%m-%dT%H:%M:%S.%f")
 
     return dateobj.replace(tzinfo=timezone.utc)

blazar_dashboard/content/leases/tables.py

@@ -13,7 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from datetime import datetime
+import datetime
+
 from datetime import timezone
 from functools import partial
 
@@ -42,7 +43,7 @@ class UpdateLease(tables.LinkAction):
     classes = ("btn-create", "ajax-modal")
 
     def allowed(self, request, lease):
-        if datetime.strptime(lease.end_date, '%Y-%m-%dT%H:%M:%S.%f').\
+        if datetime.datetime.strptime(lease.end_date, '%Y-%m-%dT%H:%M:%S.%f').\
                 replace(tzinfo=timezone.utc) > datetime.now(timezone.utc):
             return True
         return False