Ensure that the zuul home can be traversed
Ensure that the zuul home can be traversed

The default permissions for the zuul home directory
are not the same in the various distributions.
As /home/zuul contains the sources, a 700 default may be
problematic when accessing those files, so make sure
that the executable permissions are set.

Closes-Bug: 1846251
Change-Id: Ic9769e56274d7205844b86d3b5200a6415e4acad

openstack-dev/devstack,dtroyer/devstack,nawawi/openstack,openstack-dev/devstack,dtroyer/devstack,nawawi/openstack