Config value dnsmasq_router missing quotes around default
value in:
1. playbooks/inventory/group_vars/localhost
2. playbooks/inventory/group_vars/target
So if user just uncomment option dnsmasq_router Ansible fails because
of missing quotes. Let's add these missing quotes arround
dnsmasq_router.
Change-Id: Ia8f38b00eba340e2d2cf40671f8ac8a53efc6b4e
Story: 2006517
Task: 36518