Skip floating IPs tests with new config options

Tempest patch Iedc3c7f9d045408f54d94c34b478fb1b28b593c9 added
the new config options to enable/disable the floating ips support in cloud.

Patrole floating IPS tests also should consider that  config options to
disable those tests.

Change-Id: I5a57410342d2503f0e9fc7f7777df9d14ceb8f92
3 files changed