snf-deploy: Fix pithos_url in register

New version of kamaki accepts the location of
images to register as container:file instead of the old
one "pithos://uuid/location".

snf-deploy/fabfile.py

@@ -1208,11 +1208,11 @@ def register_image(image="debian_base.diskdump"):
     with settings(host_string=env.env.db.ip):
         uid, user_auth_token, user_uuid = get_auth_token_from_db(env.env.user_email)
 
-    pithos_url = "pithos://{0}/images/{1}".format(user_uuid, image)
+    image_location = "images:{0}".format(image)
     cmd = """
     sleep 5
     kamaki image register "Debian Base" {0} --public --disk-format=diskdump --property OSFAMILY=linux --property ROOT_PARTITION=1 --property description="Debian Squeeze Base System" --property size=450M --property kernel=2.6.32 --property GUI="No GUI" --property sortorder=1 --property USERS=root --property OS=debian
-    """.format(pithos_url)
+    """.format(image_location)
     try_run(cmd)
 
 @roles("client")