Fix writefreely role to be idempotent.
---
# https://forums.plex.tv/t/read-me-first-about-server-armv7-and-armv8-ubuntu-debian/226567
- name: add plex apt key
become: yes
apt_key: url="https://downloads.plex.tv/plex-keys/PlexSign.key"
- name: add plex apt repo
become: yes
apt_repository: repo="deb http://downloads.plex.tv/repo/deb public main"
notify: restart plex service
- name: update apt package cache
become: yes
apt: upgrade="dist" update_cache="yes" cache_valid_time="3600"
- name: install plex server
become: yes
apt: name="plexmediaserver"
notify: restart plex service