kolla: add sudo for setup_docker.sh

Otherwise, the script will fail.

Also add for tox invocation until potential group issue is sorted out
(group membership applied to current running shell).

Change-Id: Ic84d5435761deae0d28909c813cb1d87540fbb21

jenkins/jobs/kolla.yaml

@@ -8,8 +8,8 @@
       - gerrit-git-prep
       - shell: |
           #!/bin/bash -xe
-          tests/setup_docker.sh
-          tox -e images
+          sudo tests/setup_docker.sh
+          sudo tox -e images
 
     publishers:
       - console-log