Add default storage class name for pvc
Pvc creation was adding a default storage class to the spec causing the test to
fail. This change adds the default storage when we don't want it specified
explicitly
instance_test.go:336: assertion failed:
--- tc.VolumeClaimSpec.StorageClassName
+++ instancePVC.Spec.StorageClassName
(*string)(
- 	nil,
+ 	&"standard",
)
@@ -268,6 +268,7 @@ func TestReconcilePGDATAVolume(t *testing.T) {
v1.ResourceStorage: resource.MustParse("1Gi"),
},
},
+ StorageClassName: new(string),
},
}, {
Name: "instance2",
