Altstep local variables are reset when another altstep, executed among with as_rsl_meas_res(), repeats. Move the chan_est variable to ConnHdlr, so that it does not get reset.
This ensures that UL SACCH blocks always contain the expected content and a proper L1 SACCH header, rather than the dummy measurement report hard-coded in trxcon/firmware. As a result, the BTS receives consistent and realistic UL SACCH from the very beginning.
hnbgw: Fix race condition in TC_stat_stp_sctp_disconnected
It can happen that first time check for sgsn/msc state they are still connecting to stp (M3UA) or to ttcn3 process (SCCP/RANAP). Use wait_converge=true to simply wait until they are conncted.