Add records in format ${ansible_host} ${FQDN} ${short} from inventory to /etc/hosts

Config example:

    hosts_pin: yes

Inventory example:

    node1.site.local ansible_host=10.2.1.5
    node2.site.local ansible_host=10.2.1.6
    node3.site.local ansible_host=10.2.1.7

Result /etc/hosts:

    10.2.1.5 node1.site.local node1
    10.2.1.6 node2.site.local node2
    10.2.1.7 node3.site.local node3