Patch holes in error setting

Author: avarsava

plugin-vidarr/src/main/java/ca/on/oicr/gsi/shesmu/vidarr/ImportStateAttemptSubmit.java

@@ -19,7 +19,7 @@
 
 public class ImportStateAttemptSubmit extends ImportState {
   private int retryMinutes = 5;
-  List<String> errors = null;
+  List<String> errors = List.of();
   private final int attempt;
 
   public ImportStateAttemptSubmit(int attempt) {
@@ -77,6 +77,7 @@ public PerformResult perform(
       case 500:
         { // Internal Server Error
           retryMinutes = Math.min(retryMinutes * 2, 60);
+          errors = List.of(response.body());
           return new PerformResult(errors, ActionState.FAILED, this);
         }
       case 507: