Fix readthedocs.yml

Also fix conf.py lint errors
etc/requirements.txt is hardcoded in rtd config
to support older builds I cannot change it
untill the next release

Issue-ID: CIMAN-33
Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
Change-Id: I27f1dcf32d226ea094b20ad275b318d07fa9648b
3 files changed