bsc: set the AMR start-mode that the tests expect

osmo-bsc currently has a bug that fails to reflect the correct
start-mode in the AMR MultiRate config IE.

And it went unnoticed that the ttcn tests expect a MultiRate config of
ICMI = 1, even though the used configuration should yield ICMI = 0.
See mr_conf = '2804'O, where the '8' indicates ICMI = 1.

As a first fix of the ttcn3-bsc-tests, configure the BSC according to
the expected ICMI value and Start Mode, i.e. ICMI = 1 and StartMode = 0,
which is configured by 'amr tch-[fh] start-mode 1'. This should make
these tests pass as-is for both the current osmo-bsc as well as an
osmo-bsc where the bug is fixed, with minimal changes to the current
tests. See also OS#4868.

An upcoming patch will add tests for 'start-mode auto'.

Related: OS#4868
Change-Id: I4cff01c37d5c7e301e9a01f773b7e009a789519b
1 file changed