Integration of the extracted Socks5 bytestream API in file transfer API

• adds methods to Socks5ByteStreamManager to ignore a specific Socks5 bytestream request (to not notify about an incoming request if the request is expected as a reply to the file transfer request)

• adds test for ignoring Socks5 bytestream requests

FileTransferNegotiator:

• now uses namespace constants from Socks5ByteStreamManager and IBBTransferNegotiator (were doubled in old implementation)

• prevent multiple adding of features to ServiceDiscoveryManager

• replaced usage of obsolete Socks5TransferNegotiatorManager with Socks5TransferNegotiator

FileTransferNegotiatorManager:

• removed unused interface

Socks5TransferNegotiator:

• rewrite to use extracted Socks5 bytestream API

Socks5TransferNegotiatorManager:

• obsolete because of extracted Socks5 bytestream API

StreamNegotiator:

• extended signatures of blocking methods to throw InterruptedException if interrupted while waiting for IO operations

Tests:

• SmackTestCase that use a real XMPP server establishing Socks5 bytestreams

• tests will fail if XMPP server doesn't support Socks5 bytestreams or bidirectional streams