Merge "res_pjsip: Record the serializer earlier on the tdata." into 13

diff --cc res/res_pjsip.c
Simple merge

diff --cc res/res_pjsip/pjsip_distributor.c
Simple merge

diff --cc res/res_pjsip_outbound_publish.c
Simple merge

diff --cc res/res_pjsip_outbound_registration.c
Simple merge