Make config.reload_in_progress key read only

It's not very good idea to allow user apps changing internal key
reload_in_progress.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>

exec/main.c

@@ -1051,6 +1051,7 @@ static void set_icmap_ro_keys_flag (void)
 	icmap_set_ro_access("totem.rrp_mode", CS_FALSE, CS_TRUE);
 	icmap_set_ro_access("totem.netmtu", CS_FALSE, CS_TRUE);
 	icmap_set_ro_access("qb.ipc_type", CS_FALSE, CS_TRUE);
+	icmap_set_ro_access("config.reload_in_progress", CS_FALSE, CS_TRUE);
 }
 
 static void main_service_ready (void)