bts: TC_meas_res_sign_*: Properly configure supp-meas-info

Since recently, osmo-bts may not be restarting after each test. Which
means the supp-meas-info is not reset when test starts. Hence, some of
these tests started failing because a previous test set a value
different than the default one.

Change-Id: Iaa16b33781a8f490fc1cdbafda407755371dbe7f
1 file changed