Make lbaasv2 scenario API job non-voting
Make lbaasv2 scenario API job non-voting

1. Introduced experimental job - lbaasv2 scenario API. Tested
this job and verified its working. Hence making this job as
non-voting as the next step.
2. For info on testing, see https://review.openstack.org/#/c/205713/

Change-Id: I52ed8e7d07de7d748c6848a3f31750ca8a4d864c

noorul/os-project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,noorul/os-project-config,openstack-infra/project-config,Tesora/tesora-project-config