Add floating ip status to table

There is missing ability to see Floating IP status in Horizon
The ability exist in CLI and was enhanced by
https://blueprints.launchpad.net/neutron/+spec/fip-op-status
This patch add the missing attribute to the floating ip table.

Change-Id: Ic64624422a6e1dce828b329eac9938bafabb84bf
Closes-bug: #1323604
Use cinder API v2, remove support for v1

Cinder API v1 was deprecated in Juno and is being removed in Kilo.

Implements: blueprint horizon-cinder-v2-preferred-version
Closes-Bug: 1376424
Change-Id: I9bbdf1753a06d33b441a85ff448f475545eafc80
Merge "Use cinder API v2, remove support for v1"
Merge branch 'master' of https://github.com/openstack/horizon