Added ['date_time']['tz_offset'] using %z to get the time offset rather than time zone.

system/setup

@@ -452,6 +452,7 @@ class Facts(object):
         self.facts['date_time']['iso8601_micro'] = now.utcnow().strftime("%Y-%m-%dT%H:%M:%S.%fZ")
         self.facts['date_time']['iso8601'] = now.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ")
         self.facts['date_time']['tz'] = time.strftime("%Z")
+	self.facts['date_time']['tz_offset'] = time.strftime("%z")
 
 
     # User