ggsn: Introduce test TC_pdp46_act_deact_apn4

Related osmo-ggsn.git libgtp fix: I6c6215a4ce478afabc78ffaf5ffb0cf829e41226

Related: OS#4154
Change-Id: Ia1893e0c181307ac1ceb07ee5f496507f7a603c8
2 files changed