No longer consider "jenkins" votes when enqueuing
No longer consider "jenkins" votes when enqueuing

Our Gerrit no longer has any "jenkins" account verified votes on
open changes, so there is no reason to consider it in our pipeline
configuration. Remove the reference and simplify configuration.

Change-Id: I80bc50c4dc6c41c732051e57c78230a18c3673af

openstack-infra/project-config,openstack-infra/project-config