The code module represents enum for constant comparison

This module provides facilitation to use uniform codes across various test
features. Users can import this  module and use these codes to maintain
readability and one point of change.

Signed-off-by: Santhosh Edukulla <Santhosh.Edukulla@citrix.com>
CLOUDSTACK-2243: Add automation tests for VMs base image update faclity

Signed-off-by: Girish Shilamkar <girish@clogeny.com>