bsc: fix TC_ho_into_this_bsc_a5_4

This test should be failing as it is, because A5/4 is not permitted in
the BSC's configuration! It only passed all this time because osmo-bsc
is/was/is going to have been flawed and just takes the Chosen Encryption
Algorithm IE as the basis for choosing an encryption algorithm. Instead
it should intersect the pemitted algos with the BSC config. It will soon
do that, and then this test would fail as it should have. After fixing
the BSC config for the test with this patch, we'll not see it failing in
the transition.

Related: SYS#5839
Change-Id: Ic6bbbeea36e6ea26d16bbb510fd08f5c0defb955
1 file changed