qa_crowbarsetup: Fix deployment of ec2-api on HA clouds
qa_crowbarsetup: Fix deployment of ec2-api on HA clouds

Right now, ec2-api ends up on the first compute node, but that's not
what is expected: we'd want it to be on one of the controllers.

vmoravec/automation,SUSE-Cloud/automation,vmoravec/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,vmoravec/automation,SUSE-Cloud/automation,gosipyan/automation,vmoravec/automation,aspiers/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation