[automerger skipped] Merge "apf: Remove IPv6 NAT-T keepalive related codes and ApfTest improvement" into qt-dev
am: 2913482e -s ours
am skip reason: change_id If01bc6a71cf26e13edc049d969d23088fa8242e4 with SHA1 ec92b943 is in history
Change-Id: I155dc9f533a467f8ed1fd2a162b09969d80392dc