Make WaitIndication T3172 configurable

Tbftest expectatins need to change because 5000/20 = 250 < 255, hence
the message is now sent as units of 20ms instead of seconds.

Related: OS#3928
Change-Id: I48b34b94b1a5dfb046a3a6cf8a0d944a7c9b6754
diff --git a/tests/tbf/TbfTest.err b/tests/tbf/TbfTest.err
index e700fe2..be7caf0 100644
--- a/tests/tbf/TbfTest.err
+++ b/tests/tbf/TbfTest.err
@@ -7615,7 +7615,7 @@
 TBF(TFI=0 TLLI=0xffffffff DIR=DL STATE=NULL EGPRS) changes state from NULL to FLOW
 The MS object cannot fully confirm an unexpected TLLI: 0xffeeddcc, partly confirmed
 TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS) appending 100 bytes
-packet reject: 40 84 7f f7 6e e6 41 4b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 
+packet reject: 40 84 7f f7 6e e6 7e ab 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 
 === end test_packet_access_rej_epdan ===
 === start test_packet_access_rej_prr ===
 MS requests Uplink resource on CCCH/RACH: ra=0x70 (8 bit) Fn=2654167 qta=31