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

Added ansible role for influxdb

Introduced host groups for monitoring and influxdb and assign role

Monitoring is deployed on a separate node called monitoring01 by
default

Co-Authored-By: zhubingbing <zhubingbing10@gmail.com>

Change-Id: If2465a14b18c6c3fd657af587a0b85f6b7a0191a
Partially-Implements: Blueprint performance-monitoring