Unit tests for listing availability zones

Change-Id: If015edba853a7fb34f075cb44779af90256597be
unit and pep8 fix for availibility zones

Change-Id: Ibf1d9df4f43a7606eb53444221906815f9c523fe
Capture Image from running virtual server

Change-Id: Ia5ab1eb71bbcf0de5a0e4a9ff5be0a4ebf05c4ec
Merge pull request #115 from ajiang38740/jumpgate_unit_tests

Jumpgate unit tests