add support for admin-managed-pv annotation

Author: Patryk Wasielewski

pkg/splunk/enterprise/configuration.go

@@ -120,9 +120,9 @@ func getSplunkVolumeClaims(cr splcommon.MetaObject, spec *enterpriseApi.CommonSp
 		storageClassName = spec.VarVolumeStorageConfig.StorageClassName
 	}
 
-	volumeClaim.Spec.StorageClassName = &storageClassName
-
 	if adminManagedPV {
+		volumeClaim.Spec.StorageClassName = nil
+
 		volumeClaim = corev1.PersistentVolumeClaim{
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      fmt.Sprintf(splcommon.PvcNamePrefix, volumeType),
@@ -145,6 +145,8 @@ func getSplunkVolumeClaims(cr splcommon.MetaObject, spec *enterpriseApi.CommonSp
 			},
 		}
 	} else {
+		volumeClaim.Spec.StorageClassName = &storageClassName
+
 		volumeClaim = corev1.PersistentVolumeClaim{
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      fmt.Sprintf(splcommon.PvcNamePrefix, volumeType),