fixed so that trickle timer and route lifetime rpl config is updated at global repair

This PR makes sure that nodes in the RPL network pick up new configuration of trickle timers and route default lifetime at a global repair. This makes the whole network run the same settings as the RPL Root when it is changing the configuration (I have had problems getting all the nodes in a network to update timers and route-lifetime when updating the RPL Root with new config in a already deployed network).