ec2api experimental job: fix rally job definition
ec2api experimental job: fix rally job definition

rally project previously needed to copy something to devstack
during installation. right now 'rally' is a devstack plugin
and it doesn't need it.

Change-Id: If1d90f5274c94bfba90889f457d65a525ff2aae4

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