Update test to fail instead of skip if floating pool is already allocated

The FloatingIPsBulkAdminTestJSON skips instead of fail if the pool is already configured.
This patch updates the test to fail when the floating pool is found to be already configured.

Change-Id: Iee5317c174c9abfc3514b6833d35e17969b15693
Closes-Bug: #1401280
1 file changed