Resolves: #452328

Summary: range search anomaly on the integer type
Description: Retro changelog plugin automatically creates an index for
changeNumber, which has an integer type.  To support the reange search againt
changeNumber, the index should have the matching order "integerOrderingMatch".

ldap/servers/plugins/retrocl/retrocl_create.c

@@ -166,6 +166,10 @@ static int retrocl_create_be(const char *bedir)
     val.bv_len = strlen(val.bv_val);
     slapi_entry_add_values( e, "nsindextype", vals );
 
+    val.bv_val = "integerOrderingMatch";
+    val.bv_len = strlen(val.bv_val);
+    slapi_entry_add_values( e, "nsMatchingRule", vals );
+
     pb = slapi_pblock_new ();
     slapi_add_entry_internal_set_pb( pb, e, NULL /* controls */, 
 				     g_plg_identity[PLUGIN_RETROCL],