Adds status check for FloatingIP in network scenarios

Verifies FloatingIP changes status correctly on association and dis-association

Scenarios:
test_network_basic_op
test_network_advanced_server_ops

Status is verified after connectivity check and without a waiter in order to
not mask unknown races in Neutron

Changes show() to refresh() to keep consistency

Partially Implements: blueprint fip-op-status (this is a Neutron bp:
https://blueprints.launchpad.net/neutron/+spec/fip-op-status)
Partially Implements: blueprint neutron-advanced-scenarios

Change-Id: Ibd45f3092cebc8f9fd0d16a3a543c2ef72156409
Merge "Adds status check for FloatingIP in network scenarios"