Fix swallowed errors in tests of photon_pd package

pkg/volume/photon_pd/photon_pd_test.go

@@ -179,6 +179,9 @@ func TestPlugin(t *testing.T) {
 		PersistentVolumeReclaimPolicy: v1.PersistentVolumeReclaimDelete,
 	}
 	provisioner, err := plug.(*photonPersistentDiskPlugin).newProvisionerInternal(options, &fakePDManager{})
+	if err != nil {
+		t.Fatalf("Error creating new provisioner:%v", err)
+	}
 	persistentSpec, err := provisioner.Provision()
 	if err != nil {
 		t.Errorf("Provision() failed: %v", err)
@@ -198,6 +201,9 @@ func TestPlugin(t *testing.T) {
 		PersistentVolume: persistentSpec,
 	}
 	deleter, err := plug.(*photonPersistentDiskPlugin).newDeleterInternal(volSpec, &fakePDManager{})
+	if err != nil {
+		t.Fatalf("Error creating new deleter:%v", err)
+	}
 	err = deleter.Delete()
 	if err != nil {
 		t.Errorf("Deleter() failed: %v", err)
@@ -228,11 +234,17 @@ func TestMounterAndUnmounterTypeAssert(t *testing.T) {
 	}
 
 	mounter, err := plug.(*photonPersistentDiskPlugin).newMounterInternal(volume.NewSpecFromVolume(spec), types.UID("poduid"), &fakePDManager{}, &mount.FakeMounter{})
+	if err != nil {
+		t.Fatalf("Error creating new mounter:%v", err)
+	}
 	if _, ok := mounter.(volume.Unmounter); ok {
 		t.Errorf("Volume Mounter can be type-assert to Unmounter")
 	}
 
 	unmounter, err := plug.(*photonPersistentDiskPlugin).newUnmounterInternal("vol1", types.UID("poduid"), &fakePDManager{}, &mount.FakeMounter{})
+	if err != nil {
+		t.Fatalf("Error creating new unmounter:%v", err)
+	}
 	if _, ok := unmounter.(volume.Mounter); ok {
 		t.Errorf("Volume Unmounter can be type-assert to Mounter")
 	}