Commit
72a0a8c6e7a005b10c83f8754a647ad51124dbf3
by lynxisSGSN: Context Req In: use correct TEID-C
For a MS/UE moving from 2G to 4G, the Ctx Acks need to transmit
with the correct TEID-C which the SGSN chose in the Context Response.
Change-Id: I84dc7dda8ee1227edd68d1482a4c5bf267c16418