Add required-projects to logstash-filters and openstackci-beaker jobs
Add required-projects to logstash-filters and openstackci-beaker jobs

legacy-logstash-filters and legacy-logstash-filters-ubuntu-trusty
both attempt to use zuul-cloner against openstack-infra/system-config
during their jobs.

Same thing for openstackci-beaker for the openstack-infra/project-config
repository.

Change-Id: I35823579c2d10af8f4dc2340067f859373612f9e

openstack-infra/openstack-zuul-jobs,openstack-infra/openstack-zuul-jobs