premailer: replace logger instead of altering handlers.

Initial logger posted to stderr poluting output and tests

rhodecode/model/notification.py

@@ -330,6 +330,11 b' EMAIL_COMMENT_STATUS_CHANGE_SUBJECT_TEMP'
 # Title of email for inline comment on a file in commit
 EMAIL_COMMENT_FILE_SUBJECT_TEMPLATE = ''
 
+import cssutils
+# hijack css utils logger and replace with ours
+log = logging.getLogger('rhodecode.cssutils.premailer')
+cssutils.log.setLog(log)
+
 
 class EmailNotificationModel(BaseModel):
     TYPE_COMMIT_COMMENT = Notification.TYPE_CHANGESET_COMMENT
@@ -373,11 +378,7 b' class EmailNotificationModel(BaseModel):'
             'rhodecode:templates/email_templates/pull_request_update.mako',
     }
 
-    premailer_instance = premailer.Premailer(
-        cssutils_logging_level=logging.ERROR,
-        cssutils_logging_handler=logging.getLogger().handlers[0]
-        if logging.getLogger().handlers else None,
-    )
+    premailer_instance = premailer.Premailer()
 
     def __init__(self):
         """