pv controller test: more test cases

The main goal was to cover retrieval of a PVC from the apiserver when
it isn't known yet. This is achieved by adding PVCs and (for the sake
of completeness) PVs to the reactor, but not the controller, when a
special annotation is set. The approach with a special annotation was
chosen because it doesn't affect other tests.

The other test cases were added while checking the existing tests
because (at least at first glance) the situations seemed to be not
covered.

pkg/controller/volume/persistentvolume/pv_controller_test.go

@@ -78,6 +78,17 @@ func TestControllerSync(t *testing.T) {
 				return nil
 			},
 		},
+		{
+			"5-2-2 - complete bind when PV and PVC both exist",
+			newVolumeArray("volume5-2", "1Gi", "", "", v1.VolumeAvailable, v1.PersistentVolumeReclaimRetain, classEmpty),
+			newVolumeArray("volume5-2", "1Gi", "uid5-2", "claim5-2", v1.VolumeBound, v1.PersistentVolumeReclaimRetain, classEmpty, pvutil.AnnBoundByController),
+			newClaimArray("claim5-2", "uid5-2", "1Gi", "", v1.ClaimPending, nil),
+			newClaimArray("claim5-2", "uid5-2", "1Gi", "volume5-2", v1.ClaimBound, nil, pvutil.AnnBoundByController, pvutil.AnnBindCompleted),
+			noevents, noerrors,
+			func(ctrl *PersistentVolumeController, reactor *pvtesting.VolumeReactor, test controllerTest) error {
+				return nil
+			},
+		},
 		{
 			// deleteClaim with a bound claim makes bound volume released.
 			"5-3 - delete claim",