Failing tests for RawSocketServerProtocol

Hi,

I am in the process of updating autobahn to 0.18.1 for fedora and I encounter failing tests on the build server and on my system. Tests output:

=================================== FAILURES ===================================
_________________________ Test.test_raw_socket_server1 _________________________

self = <test_asyncio_rawsocket.Test testMethod=test_raw_socket_server1>

    def test_raw_socket_server1(self):
    
>       server = RawSocketServerProtocol(max_size=10000)
E       TypeError: __init__() got an unexpected keyword argument 'max_size'

autobahn/asyncio/test/test_asyncio_rawsocket.py:87: TypeError
______________________ Test.test_raw_socket_server_errors ______________________

self = <test_asyncio_rawsocket.Test testMethod=test_raw_socket_server_errors>

    def test_raw_socket_server_errors(self):
    
>       server = RawSocketServerProtocol(max_size=10000)
E       TypeError: __init__() got an unexpected keyword argument 'max_size'

autobahn/asyncio/test/test_asyncio_rawsocket.py:110: TypeError
=============== 2 failed, 161 passed, 1 skipped in 0.53 seconds ================

The tests are defined there and from what I see in the definition of RawSocketProtocol here the max_size parameter doesn't exist which expected. What I find strange is: according to travis everything is fine.

Start with autobahn/asyncio/test/test_asyncio_rawsocket.py at test_raw_socket_server1 and test_raw_socket_server_errors, then compare their RawSocketServerProtocol call with the constructor in autobahn/asyncio/rawsocket.py. Run the failing tests and determine whether the test or implementation matches the supported API; done means both failures are resolved without breaking the existing suite.