[DOC BLD FIX] Fix formatting in cinder.compute.nova
[DOC BLD FIX] Fix formatting in cinder.compute.nova

The docstring for novaclient was not properly
formatted causing Sphinx to generate warnings and the
resulting document was not bolded properly.

This change corrects the formatting to remove the
warning and enable proper doc generation.

Change-Id: Ibe204e8ed2cc2d0557cb9ad4a0f2bf3a61744387

Datera/cinder,openstack/cinder,openstack/cinder,eharney/cinder,mahak/cinder,phenoxim/cinder,eharney/cinder,Datera/cinder,j-griffith/cinder,mahak/cinder,phenoxim/cinder,j-griffith/cinder