Add UuidSerializer and improve serialization service and its test suite

[mdumandag]

Depends on #217

This PR implements the UuidSerializer as a default serializer.
With this change, objects of uuid.UUID type will be serialized using this serializer and java.util.UUID objects will be converted to that type when received from the server.

Apart from that, this PR includes some other changes.

• Objects of bytearray type will now be serialized with ByteArraySerializer
• Some small improvements on the hot path of the to_data function.
• Removing faulty range checks from IntegerSerializer and LongSerializer. Formerly, we were throwing an exception for -1 << 31 and -1 << 63 values. However, they are valid as Integer or Long. Now, we are relying on the struct package to throw exceptions on out-of-range values.
• Faulty constant definitions are fixed. (MAX_SHORT, MAX_INT, MAX_LONG) Unused constant definitions are removed. (MAX_FLOAT32, MIN_FLOAT32)
• Unreachable methods (like JavaClassSerializer.write_data, LinkedListSerializer.write_data etc.) are commented out.
• BigDecimalSerializer is removed.
• Implementation of DatetimeSerializer is fixed and made compatible with java.util.Date.
• The serialization test suite is significantly improved to cover all serializers in various scenarios like set/get from the client, set from the client, get from the remote controller, set on the server, and get from the client.