Updated grafana image to 4.5.2
Updated grafana image to 4.5.2

switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible,switch-ch/switchdrive-ansible