[ci skip] use only newer grafana

Author: paulfantom

README.md

@@ -14,6 +14,7 @@ Provision and manage [grafana](https://github.com/grafana/grafana) - platform fo
 
 - Ansible >= 2.5
 - libselinux-python on deployer host (only when deployer machine has SELinux)
+- grafana >= 5.1 (for older grafana versions use this role in version 0.10.1 or earlier)
 
 ## Role Variables
 

tasks/install.yml

@@ -16,8 +16,6 @@
 
 - name: Clean apt cache
   command: apt clean
-  #  tags:
-  #    - ansible_skip_lint
   when:
     - old_grafana_pkgs is changed
     - ansible_pkg_mgr == "apt"