Improve MS logging

Use same formatting similar to what's now used in TBF, which is far more
easy to grep and follow. This way one can easily follow what happens to
a given IMSI, a give TFI, a given TLLI, etc.

Change-Id: If9b325764c8fd540d60b6419f32223fd7f5a5898
diff --git a/tests/app_info/AppInfoTest.err b/tests/app_info/AppInfoTest.err
index 13e84b7..3624250 100644
--- a/tests/app_info/AppInfoTest.err
+++ b/tests/app_info/AppInfoTest.err
@@ -17,23 +17,23 @@
 Creating MS object, TLLI = 0xffffffff
 Modifying MS object, TLLI = 0xffffffff, MS class 0 -> 10
 Modifying MS object, TLLI = 0xffffffff, EGPRS MS class 0 -> 11
-MS(TLLI=0xffffffff, IMSI=, TA=220, 10/11,) Enabled EGPRS, mode EGPRS
+MS(TA-220:MSCLS-10-11) Enabled EGPRS, mode EGPRS
 [DL] algo B <multi> (suggested TRX: 0): using 4 slots
 PDCH(bts=0,trx=0,ts=4) Attaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
 PDCH(bts=0,trx=0,ts=5) Attaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
 PDCH(bts=0,trx=0,ts=6) Attaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
 PDCH(bts=0,trx=0,ts=7) Attaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
-MS(TLLI=0xffffffff, IMSI=, TA=220, 10/11,) Attaching DL TBF: TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS)
+MS(TA-220:MSCLS-10-11) Attaching DL TBF: TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS)
 ws(64)
 Creating MS object, TLLI = 0xffffffff
 Modifying MS object, TLLI = 0xffffffff, MS class 0 -> 12
 Modifying MS object, TLLI = 0xffffffff, EGPRS MS class 0 -> 13
-MS(TLLI=0xffffffff, IMSI=, TA=220, 12/13,) Enabled EGPRS, mode EGPRS
+MS(TA-220:MSCLS-12-13) Enabled EGPRS, mode EGPRS
 [DL] algo B <multi> (suggested TRX: 0): using 3 slots
 PDCH(bts=0,trx=0,ts=4) Attaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 2 TBFs, USFs = 00, TFIs = 00000003.
 PDCH(bts=0,trx=0,ts=5) Attaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 2 TBFs, USFs = 00, TFIs = 00000003.
 PDCH(bts=0,trx=0,ts=6) Attaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 2 TBFs, USFs = 00, TFIs = 00000003.
-MS(TLLI=0xffffffff, IMSI=, TA=220, 12/13,) Attaching DL TBF: TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS)
+MS(TA-220:MSCLS-12-13) Attaching DL TBF: TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS)
 ws(64)
 
 --- test_sched_app_info_ok ---
@@ -60,10 +60,10 @@
 PDCH(bts=0,trx=0,ts=5) Detaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 2 TBFs, USFs = 00, TFIs = 00000003.
 PDCH(bts=0,trx=0,ts=6) Detaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 2 TBFs, USFs = 00, TFIs = 00000003.
 PDCH(bts=0,trx=0,ts=7) Detaching TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
-MS(TLLI=0xffffffff, IMSI=, TA=220, 10/11,) Detaching TBF: TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS)
+MS(TA-220:MSCLS-10-11) Detaching TBF: TBF(DL:TFI-0-0-0:STATE-NEW:EGPRS)
 PDCH(bts=0,trx=0,ts=4) Detaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000002.
 PDCH(bts=0,trx=0,ts=5) Detaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000002.
 PDCH(bts=0,trx=0,ts=6) Detaching TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS), 1 TBFs, USFs = 00, TFIs = 00000002.
-MS(TLLI=0xffffffff, IMSI=, TA=220, 12/13,) Detaching TBF: TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS)
-MS(TLLI=0xffffffff, IMSI=, TA=220, 12/13,) Destroying MS object
-MS(TLLI=0xffffffff, IMSI=, TA=220, 10/11,) Destroying MS object
+MS(TA-220:MSCLS-12-13) Detaching TBF: TBF(DL:TFI-0-0-1:STATE-NEW:EGPRS)
+MS(TA-220:MSCLS-12-13) Destroying MS object
+MS(TA-220:MSCLS-10-11) Destroying MS object