Bluetooth: Mesh: IV Index timer is not started

This fixes an issue where IV index stage counting timer is not
started after the node is provisioned. This would have prevented node
from performing IV index updates.

Signed-off-by: Omkar Kulkarni <omkar.kulkarni@nordicsemi.no>

subsys/bluetooth/mesh/main.c

@@ -110,6 +110,8 @@ int bt_mesh_provision(const uint8_t net_key[16], uint16_t net_idx,
 		return err;
 	}
 
+	bt_mesh_net_settings_commit();
+
 	bt_mesh.seq = 0U;
 
 	bt_mesh_comp_provision(addr);