The provider_config is configured wrong. And Grafana only supports one
Memcached instance for session, which is bad for high available.
Use mysql to provider the session storage.
TrivialFix
Change-Id: I889a961d7f36f44701654fbac04b4bff05043506
Added ansible role to deploy grafana
Added host group for grafana deployment
Co-Authored-By: zhubingbing <zhubingbing10@gmail.com>
Change-Id: I3dec4e8586b6f65fa7de66a48506d1c79de2fe1e
Partially-Implements: Blueprint performance-monitoring
