tlv: Fix recursive initialization from_dict()

When calling from_dict() on a hierarchy of nested BER_TLV_IE,
only the first/outer layer of TLV_IE_Collection would get its
'decoded' initialized correctly from the dict.  Subsequent layers
were not, as the 'decoded=' was passed as parameter during instance
initialization.  If we first instantiate the class and then call the
from_dict() method, the recursive initialization down the full hierarchy
works as expected.

Change-Id: I795a33ed8dfa8454dc9079c189ab7b2ba64a3b72

pySim/tlv.py

@@ -373,7 +373,8 @@ class TLV_IE_Collection(metaclass=TlvCollectionMeta):
             for k in i.keys():
                 if k in self.members_by_name:
                     cls = self.members_by_name[k]
-                    inst = cls(decoded=i[k])
+                    inst = cls()
+                    inst.from_dict(i[k])
                     res.append(inst)
                 else:
                     raise ValueError('%s: Unknown TLV Class %s in %s; expected %s' %