Removed random from EAPOL PAN version increment

When GTK HASH or MAC key index is changed PAE Authenticator increments
PAN version. Removed random from PAN version increment since that is
not needed. The random resulted that PAN configuration was send
(depending on timing) with updated GTK HASH but with old version number.

Author: Mika Leppänen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1893,7 +1893,7 @@ static void ws_bootstrap_advertise_start(protocol_interface_info_entry_t *cur)
 
 static void ws_bootstrap_pan_version_increment(protocol_interface_info_entry_t *cur)
 {
-    cur->ws_info->pan_version_timer = randLIB_get_random_in_range(5, 15);
+    cur->ws_info->pan_version_timer = 1;
 }
 
 // Start network scan