Rename gate-dox-docker-save to gate-dox-buildimages-nv

Also move job into check pipeline for more testing.  And revoke sudo,
as it is not needed.

Change-Id: Ib8abea99418eba45e5234cc6d2a72b5260cc3afd
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

jenkins/jobs/dox.yaml

@@ -1,5 +1,5 @@
 - job:
-    name: 'gate-dox-docker-save'
+    name: 'gate-dox-buildimages-nv'
     node: ubuntu-xenial
 
     wrappers:
@@ -11,6 +11,7 @@
       - zuul-git-prep
       - install-distro-packages
       - extra-test-setup
+      - revoke-sudo
       - shell: |
           #!/bin/bash -ex
           ./tools/tarball.sh

zuul/layout.yaml

@@ -9096,13 +9096,12 @@ projects:
       - name: publish-to-pypi
       - name: python35-jobs-nv
     check:
+      - gate-dox-buildimages-nv
       - gate-dox-pep8-ubuntu-xenial
       - gate-dox-python27-ubuntu-xenial
     gate:
       - gate-dox-pep8-ubuntu-xenial
       - gate-dox-python27-ubuntu-xenial
-    experimental:
-      - gate-dox-docker-save
 
   - name: openstack/dragonflow
     template: