Neutron updates

Remove patches that are merged upstream.
Removed reference to files that no longer exist.
python-neutonclient updates

Update patches.
ceilometer updates

Remove patches that are merged upstream.
Use our own .conf file, we don't have tox to generate one.
Remove LICENSE that no longer exist in the repo.
python-ceilometerclient updates

Update patches.
python-cinderclient updates

Update patches.
ironic updates

Update patch.
python-ironicclient updates

Update patch.
Horizon updates

Update patches.
Remove custom theme.