Added new controller which allows the following:
- add tag to the server
- replace set of server tags with new set of tags
- get list of tags for server
- check if tag exists on a server
- remove specified tag from server
- remove all tags from server
Functional tests and annotations "@wsgi.Controller.api_version(*)"
for controller methods will be added in next patch
with creation of new API microversion.
APIImpact
Implements: blueprint tag-instances
Change-Id: Ibc44228aeae94c17353af7fccfcfb2c11b2e9190
bfe8e7484d