updated usages of super to use python3 variation

daemon/core/api/grpc/server.py

@@ -202,7 +202,7 @@ class CoreGrpcServer(core_pb2_grpc.CoreApiServicer):
     """
 
     def __init__(self, coreemu):
-        super(CoreGrpcServer, self).__init__()
+        super().__init__()
         self.coreemu = coreemu
         self.running = True
         self.server = None

daemon/core/api/tlv/coreapi.py

@@ -94,12 +94,12 @@ class CoreTlvDataObj(CoreTlvData):
         """
         Convenience method for packing custom object data.
 
-        :param obj: custom object to pack
+        :param value: custom object to pack
         :return: length of data and the packed data itself
         :rtype: tuple
         """
         value = cls.get_value(value)
-        return super(CoreTlvDataObj, cls).pack(value)
+        return super().pack(value)
 
     @classmethod
     def unpack(cls, data):
@@ -109,7 +109,7 @@ class CoreTlvDataObj(CoreTlvData):
         :param data: data to unpack custom object from
         :return: unpacked custom object
         """
-        data = super(CoreTlvDataObj, cls).unpack(data)
+        data = super().unpack(data)
         return cls.new_obj(data)
 
     @staticmethod