Add example how to associate FIP via neutron
Add example how to associate FIP via neutron

This patch adds example, that demonstrate preferable way to associate
Floating IP via neutron resources in HOT template.

Change-Id: Id4c5fcf2bac86b32b9527ec668b01caef607f2d5
Closes-Bug: #1406391

potsmaster/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,kairoaraujo/openstack-manuals,saeki-masaki/openstack-manuals,gongysh2004/openstack-manual,kairoaraujo/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals