Fix repo values for RTaskWaitingReason

In 3.9 this enum has values of 0, 1, 2. In 4.0 the "1" was removed,
shifting value of 2 to 1. Fortunately, since 4.0 we don't use values
other than 0 (at least it seems so); but in order to avoid migration
issues we now restored the deleted value of 1 as a placeholder.

Mapping of enums should be changed to be less fragile. Until that,
we CANNOT delete intermediary values from R-enums to avoid this kind
of problems.

This resolves MID-6117.

repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/data/common/enums/RTaskWaitingReason.java

@@ -18,6 +18,9 @@ public enum RTaskWaitingReason implements SchemaEnum<TaskWaitingReasonType> {
 
     OTHER_TASKS(TaskWaitingReasonType.OTHER_TASKS),
 
+    // See MID-6117.
+    PLACEHOLDER(null),
+
     OTHER(TaskWaitingReasonType.OTHER);
 
     private TaskWaitingReasonType reason;

repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/util/RUtil.java

@@ -317,8 +317,9 @@ public static <T extends SchemaEnum> T getRepoEnumValue(Object object, Class<T>
         }
         Object[] values = type.getEnumConstants();
         for (Object value : values) {
+            //noinspection unchecked
             T schemaEnum = (T) value;
-            if (schemaEnum.getSchemaValue().equals(object)) {
+            if (object.equals(schemaEnum.getSchemaValue())) {
                 return schemaEnum;
             }
         }