tree 83821b7b9fc8a0d5fe41b507ecdd6b973100f7be
parent 45d0bb8fe7ec2f742c94734f3c3df722b6141eea
author Bartosz Kupidura <bkupidura@mirantis.com> 1498136299 +0200
committer Bartosz Kupidura <bkupidura@mirantis.com> 1498138069 +0200

We need empty {} to evaluate alerts

For some alerts we use reclass to get variables
(ex. threshold). To get those reclass variables
we use `prometheus_server` dict, which on nodes
without prometheus class is None.
We need to provide at least empty dict in that
case.

Change-Id: Ic1f2c1776c4852701dcf9f8a76f933926b2d9aec