handover_test: show ineffective intra-cell choice

In handover decision 2, choosing an lchan to move so far takes into
account only the absolute current rxlev, and it fails to look at the
*difference* in rxlev between source and target cell.

My recent feature to favor freeing half-used TCH/H does in fact not work
well. The main reason why the test for that feature passes is that all
lchans in the test get identical measurements -- which is unrealistic.

A test with differing ratings uncovers the flaw in comparing intra-cell
candidates.

Related: SYS#5032
Change-Id: Iabce1ab44b496833c19d999fc3f2903d835c357f
1 file changed