This patch adds every project into the check queue in the Zuul
tenant to make sure that it does zuul.yaml validation and allows
for an initial self-testing commit.
This is needed for Zuul because in openstack/project-config we
define a system-required template which does this for all the
projects.
Change-Id: I80e9f59edc23d63aac9b098eea411a9e023b19f1