Neutron tag mechanism now supports network, subnet, port,
subnetpool and router. Tag support for more resources is planned.
This commit introduces a common mixin class to implement
tag operation and individual resource consumes it.
To support tag remove, network unset command is added.
Implements blueprint neutron-client-tag
Change-Id: Iad59d052f46896d27d73c22d6d4bb3df889f2352
Move existing content around based on the doc-migration specification.
Replace :doc: markup with :ref: to have sphinx keep track of where the
files move and generate valid hyperlinks.
Add a few toctrees and index pages for the new directories.
Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454
Change-Id: I253ee8f89d3ec40e39310c18bb87ed1d3d5de330
Signed-off-by: Doug Hellmann <doug@doughellmann.com>