ts_51_011: fix encoding of EF.MSISDN

The json input that is used with EF.MSISDN seems to be somewhat
ambigious. The original code accepts {"msisdn": "+4916012345678"}
only while the output is {"msisdn": [1, 1, "+4916012345678"]}. Lets
add a check and also accept the latter version.

Change-Id: I8f8dd68aac25d3fa3bc1aab06b855f8ec6640258
Related: OS#4963

pySim/ts_51_011.py

@@ -381,7 +381,11 @@ class EF_MSISDN(LinFixedEF):
     def _decode_record_hex(self, raw_hex_data):
         return {'msisdn': dec_msisdn(raw_hex_data)}
     def _encode_record_hex(self, abstract):
-        encoded_msisdn = enc_msisdn(abstract['msisdn'])
+        msisdn = abstract['msisdn']
+        if type(msisdn) == str:
+            encoded_msisdn = enc_msisdn(msisdn)
+        else:
+            encoded_msisdn = enc_msisdn(msisdn[2],msisdn[0],msisdn[1])
         alpha_identifier = (list(self.rec_len)[0] - len(encoded_msisdn) // 2) * "ff"
         return alpha_identifier + encoded_msisdn