Use provided domain name for the rest of installation

When installing IPA client, the install script used detected domain name
of the machine instead of that given by administrator (in case one was
given)

https://fedorahosted.org/freeipa/ticket/363

ipa-client/ipa-install/ipa-client-install

@@ -550,7 +550,7 @@ def main():
             cli_domain = user_input("Please provide the domain name of your IPA server (ex: example.com)", allow_empty = False)
             logging.debug("will use domain: %s\n", cli_domain)
         if options.on_master:
-            ret = ds.search(domain=options.domain, server=options.server)
+            ret = ds.search(domain=cli_domain, server=options.server)
         else:
             ret = ds.search(domain=cli_domain)
     if not cli_domain: