grid.promise: add offset on UTC date

Add ofset +0000 to utc date so after convert to another timezone it still remain valid.

/reviewed-on nexedi/slapos.core!63

slapos/grid/promise/generic.py

@@ -105,7 +105,7 @@ class PromiseQueueResult(object):
       'result': {
         'type': self.item.type(),
         'failed': self.item.hasFailed(),
-        'date': self.item.date.strftime('%Y-%m-%dT%H:%M:%S'),
+        'date': self.item.date.strftime('%Y-%m-%dT%H:%M:%S+0000'),
         'message': self.item.message
       }
     }
@@ -115,12 +115,12 @@ class PromiseQueueResult(object):
       self.item = AnomalyResult(
         problem=data['result']['failed'],
         message=data['result']['message'],
-        date=datetime.strptime(data['result']['date'], '%Y-%m-%dT%H:%M:%S'))
+        date=datetime.strptime(data['result']['date'], '%Y-%m-%dT%H:%M:%S+0000'))
     elif data['result']['type'] == TestResult.type():
       self.item = TestResult(
         problem=data['result']['failed'],
         message=data['result']['message'],
-        date=datetime.strptime(data['result']['date'], '%Y-%m-%dT%H:%M:%S'))
+        date=datetime.strptime(data['result']['date'], '%Y-%m-%dT%H:%M:%S+0000'))
     else:
       raise ValueError('Unknown result type: %r' % data['result']['type'])
 

slapos/tests/promise.py

@@ -925,7 +925,7 @@ exit 0
   "name": "my_promise.py",
   "execution-time": 0.1,
   "title": "my_promise"
-}""" % (datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S'), self.plugin_dir)
+}""" % (datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S+0000'), self.plugin_dir)
 
     if not os.path.exists(os.path.dirname(state_file)):
       os.makedirs(os.path.dirname(state_file))
@@ -946,7 +946,7 @@ exit 0
   "name": "%(name)s",
   "execution-time": 0.1,
   "title": "%(name)s"
-}""" % {'date': datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S'),
+}""" % {'date': datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S+0000'),
         'folder': self.legacy_promise_dir,
         'name': name}