Add a "tags" parameter to stack-create

blueprint stack-tags

Change-Id: Ia054e6365d6b2108f57c8e5003625bea66260cd1
Add ability to hide stacks based on tag

blueprint stack-tags

Change-Id: Ibfa2d1e57df760de937616f1470c1ad82e36f1e5
Add a show_hidden parameter to stack-list API

blueprint stack-tags

Change-Id: I904a763018fbf8449017cacfe06e734204769929