networking-ovn: disable n-novnc
networking-ovn: disable n-novnc

Disable n-novnc in the networking-ovn tempest job.  It's not needed
and causes devstack to try to clone the noVNC git repo.  devstack is
set to fail on any git_clone call, so this makes the job fail.

Change-Id: I25320897e10cfd181bb361861a9481afac1af378

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