ciao-controller: Use a defer to release quota on external IP error
ciao-controller: Use a defer to release quota on external IP error

If MapAddress() errors out release the external IP quota by using a name return
value for the error along with a defer.

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

mrkz/ciao,erick0z/ciao,kaccardi/ciao,mcastelino/ciao,01org/ciao,ciao-project/ciao,mcastelino/ciao,erick0z/ciao,markdryan/ciao,mrkz/ciao,kaccardi/ciao,mrkz/ciao,erick0z/ciao,mcastelino/ciao,tpepper/ciao,matthewrsj/ciao,rbradford/ciao,matthewrsj/ciao,ciao-project/ciao,01org/ciao,rbradford/ciao,markdryan/ciao,tpepper/ciao,matthewrsj/ciao,tpepper/ciao