Remove FloatingIPChecker from network_basic_ops

Since wait_for_floatingip()
    a) Fails regardless of FloatingIP association, and functionality
    b) Tests DB integration instead of network performance

It should not fail network scenarios or block them.
Instead, it should be checked in a different, more specific scenario

See bug 1262529 for more details

Change-Id: Ib8a018cce89ff78ac5e967dd5518e65feb9ea0fc
Merge "Remove FloatingIPChecker from network_basic_ops"