Only match full IP addresses in /etc/hosts
Only match full IP addresses in /etc/hosts

Include the space in after the IP address in the match string to avoid
matching IP addreses which only differ in an addtional digit at the end.
With the previous logic an entry for 10.1.1.1 would also delete entries
for 10.1.1.12 or 10.1.1.123.

Change-Id: I797ff261630f4115b3852138c19eb039303e27c6

openstack/openstack-ansible-openstack_hosts,openstack/openstack-ansible-openstack_hosts