transform tripleo upgrade in 2-nodes job
transform tripleo upgrade in 2-nodes job

It was a mistake when it was created but this job has to be a 2-nodes
setup.

Change-Id: I93e144873b73ce94f2121c0a4dad2292a880d5f5

Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config