Use --publish for openstack-doc-test

This requires openstack-doc-test 0.11: We now can use --publish for
openstack-doc-test. This will not copy over the www directory anymore
and replaces --nocreate-index.

Change-Id: I7180f4ffb0e6a343857f3bf362c2cc70efb644b8
Merge "Use --publish for openstack-doc-test"