Subsequent stack updates for Heat have proper set of parameters

Parameters retrieved from the existing heat stack and re-applied into the updated stack do not include special parameters
such as OS::stack_id and OS::stack_name, which cannot be accepted as input params

Change-Id: Ic42bead15267822c43ecf703e4128015c89ec6de
Closes-Bug: #1324094
Merge "Subsequent stack updates for Heat have proper set of parameters"