Fix propose-project-config-update job
Fix propose-project-config-update job

It was not using the correct gerrit-git-prep macro for a periodic job.
Correct that and also remove some builders that are not needed.

Change-Id: Ie29340f84b1a050a7c3b348a5b765b93c1ca1345

Tesora/tesora-project-config,open-switch/infra_project-config,anbangr/osci-project-config,noorul/os-project-config,coolsvap/project-config,noorul/os-project-config,openstack-infra/project-config,open-switch/infra_project-config,dongwenjuan/project-config,anbangr/osci-project-config,Tesora/tesora-project-config,citrix-openstack/project-config,coolsvap/project-config,citrix-openstack/project-config,openstack-infra/project-config,dongwenjuan/project-config