
Move documentation dependencies to doc/requirements.txt. Update tox.ini to run the documentation build the same way the zuul job does. Switch from oslosphinx, which is deprecated, to openstackdocstheme. Change-Id: I6ec358fecefcc6f88f498cf12cd45b77989f5c26 Signed-off-by: Doug Hellmann <doug@doughellmann.com>