commands: correct case of a TLV tag (A5 => a5)

The hexadecimal tag defintions of pytlv are case sensitive strings. So
'A5' is something different than 'a5'. Pytlv uses lower case letters for
the upper hexadecimal digits. Lets correct this.

Change-Id: I41a9933707783f6b1b68ebd91a365405ac0892d0
Related: OS#3850
diff --git a/pySim/commands.py b/pySim/commands.py
index 73c2247..913f394 100644
--- a/pySim/commands.py
+++ b/pySim/commands.py
@@ -35,7 +35,7 @@
 		# see also: ETSI TS 102 221, chapter 11.1.1.3.1 Response for MF,
 		# DF or ADF
                 from pytlv.TLV import TLV
-		tlvparser = TLV(['82', '83', '84', 'A5', '8a', '8b', '8c', '80', 'ab', 'c6', '81', '88'])
+		tlvparser = TLV(['82', '83', '84', 'a5', '8a', '8b', '8c', '80', 'ab', 'c6', '81', '88'])
 
 		# pytlv is case sensitive!
 		fcp = fcp.lower()