Gage Hugo d32664150f Add project tags functionality
This change adds tags functionality for projects in keystone. A user
can add a single tag with "--tag", chain "--tag" to add multiple
tags, or clear tags with "--no-tag".

Change-Id: I31cfef3e76dcefe299dacb00c11bb1a10a252628
Partially-Implements: bp project-tags
2018-02-23 20:26:57 +00:00
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