Use keyword arguments only for protocol_class invocations #52
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This bugfixes a problem in osrf_pycommon/process_utils/async_execute_process_asyncio/impl.py#L67-L68 which fails when operating on a protocol class that only uses keyword arguments.
See ros2/launch/issues/188 for more details. The traceback there if tty is enabled, which triggers this code:
Since positional ordering does not seem to be relevant here and keyword args are always more readable, I've updated the call to use keywords and the tests to force use of keyword only calls in this PR.