Add RDO mapping for sphinx_rtd_theme, remove unneeded dot
Add RDO mapping for sphinx_rtd_theme, remove unneeded dot

The python package is python-sphinx_rtd_theme. Also, there was a
dot in the python3 subpackage for nose-xcover that had to be
removed.

Change-Id: I4dddc4c517018953d7a74244c08affe1df6499e9

openstack/pymod2pkg