CLOUDSTACK-6204: Removing realhostip.com dependency

For more info, see https://cwiki.apache.org/confluence/display/CLOUDSTACK/Realhost+IP+changes

Author: Amogh Vasekar <amogh.vasekar@citrix.com>
Signed-off-by: John Kinsella <jlk@stratosec.co> 1394399081 -0700