wait_for_replicas before checking unavailableReplicas
wait_for_replicas before checking unavailableReplicas

sometimes replicas count is still 0, so test fails because
unavailableReplicas is also 0

cjellick/rancher,rancher/rancher,rancher/rancher,rancherio/rancher,rancher/rancher,rancherio/rancher,cjellick/rancher,rancher/rancher,cjellick/rancher