sgsn: add TC_attach_check_complete_resend()

MS -> SGSN: Attach Request IMSI
MS <- SGSN: Identity Request *
MS -> SGSN: Identity Response *
MS <- SGSN: Attach Complete 5x

Change-Id: I9bbbda01f3c41a2f8acf13042d6bcc86f18d74ce
1 file changed