Mark heatclient as being a universal wheel

Change-Id: I843768008e17663cfe1b3011d24105af595c92ea
Client should support stack-list for global scope

heat supports to get the stacks for global scope, heat-client should
supports too.

Change-Id: I289e9305ad4c695e4d3ee2d9a2c7ced216bb8166
Closes-Bug: #1322094
Merge "Mark heatclient as being a universal wheel"
Merge "Client should support stack-list for global scope"