e2e: update cluster-health test for new etcdctl output

e2e/ctl_v2_test.go

@@ -321,17 +321,23 @@ func TestCtlV2ClusterHealth(t *testing.T) {
 		}
 	}()
 
-	// has quorum
+	// all members available
 	if err := etcdctlClusterHealth(epc, "cluster is healthy"); err != nil {
 		t.Fatalf("cluster-health expected to be healthy (%v)", err)
 	}
 
-	// cut quorum
+	// missing members, has quorum
 	epc.procs[0].Stop()
+	if err := etcdctlClusterHealth(epc, "cluster is degraded"); err != nil {
+		t.Fatalf("cluster-health expected to be degraded (%v)", err)
+	}
+
+	// no quorum
 	epc.procs[1].Stop()
-	if err := etcdctlClusterHealth(epc, "cluster is unhealthy"); err != nil {
-		t.Fatalf("cluster-health expected to be unhealthy (%v)", err)
+	if err := etcdctlClusterHealth(epc, "cluster is unavailable"); err != nil {
+		t.Fatalf("cluster-health expected to be unavailable (%v)", err)
 	}
+
 	epc.procs[0], epc.procs[1] = nil, nil
 }