Description of problem:

# openstack ip floating delete xx.xx.xx.xx
ERROR: openstack No floatingip with a name or ID of 'xx.xx.xx.xx' exists.

`openstack ip floating delete` command expects either name or ID of floating IP. But, from help page I can see that:
<snip>
# openstack help  ip floating delete
usage: openstack ip floating delete [-h] <ip-address>

Delete a floating-ip

positional arguments:
  <ip-address>  IP address to delete  <=========

optional arguments:
  -h, --help    show this help message and exit
</snip>

Help page is suggesting to enter "ip-address". So, have `openstack ip floating delete` to accept "ip-address" as valid input.



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:
openstack ip floating delete xx.xx.xx.xx command fails if we specify IP address. 

Expected results:
`openstack ip floating delete` command should access "ip-address" as valid input.

Additional info: