Carl Bergquist authored Nov 15, 2017 and bergquist committed Nov 15, 2017

Alerting for prometheus have been depending on the step parameter from each query.
In https://github.com/grafana/grafana/pull/9226 we changed the behavior for step in the
frontend which caused problems for alerting. This commit fixes that by introducing a default
min interval value so alerting always have something to depend on.

closes #9777
(cherry picked from commit 5d6ed6c4)