MGCP_Test: use constants to predefine RTP payloads

The function f_TC_amr_x_x_rtp_conversion() is called with RTP payload
octetstrings in the parameter list. Lets define constants for those
octetstrings so that it is better visible which RTP payload is which.

Change-Id: I7efc22e2f8a941e36200dda7841089e6c97185c6
1 file changed