integrations: sync slack/hipchat formatting

rhodecode/integrations/types/hipchat.py

@@ -206,7 +206,7 b' class HipchatIntegrationType(Integration'
         }.get(event.__class__, str(event.__class__))
 
         return ('Pull request <a href="{url}">#{number}</a> - {title} '
-                '{action} by {user}').format(
+                '{action} by <b>{user}</b>').format(
             user=data['actor']['username'],
             number=data['pullrequest']['pull_request_id'],
             url=data['pullrequest']['url'],