softlayer/jumpgate — pull request #111 by Neetuj (2014-06-13 16:41:44+00:00)
Title:  read availability_zone from config if its set in config file. If not set by user or config then raise error

read availability_zone from config if its set in config file. If not set by user or config then raise error since SLapi requires it to be specified.
This addresses https://github.com/softlayer/jumpgate/issues/81