Disabled Version number periodic update if Dodag max rank inrease is not 0.

Change-Id: I64d0f507002338bced82de07898a8bc56fb92159

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bbr_api.c

@@ -455,8 +455,8 @@ void ws_bbr_seconds_timer(protocol_interface_info_entry_t *cur, uint32_t seconds
             }
             // We update the RPL version in same time to allow nodes to reselect parent
             // As configuration is made so that devices cant move downward in dodag this allows it
-            // TODO think the correct rate for this
-            if (cur->ws_info->pan_information.pan_version && cur->ws_info->pan_information.pan_version % RPL_VERSION_LIFETIME / PAN_VERSION_LIFETIME == 0) {
+            // Version number update is only done if DoDAG MAX Rank Increase parameter is 0
+            if (rpl_conf.dag_max_rank_increase == 0 && cur->ws_info->pan_information.pan_version && cur->ws_info->pan_information.pan_version % RPL_VERSION_LIFETIME / PAN_VERSION_LIFETIME == 0) {
                 // Third the rate of configuration version change at default 5 hours
                 rpl_control_increment_dodag_version(protocol_6lowpan_rpl_root_dodag);
             }