Remove unnecessary show_floatingip
Remove unnecessary show_floatingip

In check_floating_ip_status, when only call_until_true returns False,
show_floatingip is needed to get the actual floating status. This
is to reduce the unncessary call to show_floatingip.

Change-Id: Ib71e0c72149418be524fb43cfd01f9d3f7901566

masayukig/tempest,cisco-openstack/tempest,vedujoshi/tempest,Juniper/tempest,openstack/tempest,openstack/tempest,vedujoshi/tempest,cisco-openstack/tempest,masayukig/tempest,Juniper/tempest