[#962] Read data as soon as it is present in OIO and not wait till it match Buffer.writableBytes()

- Also add a new abstract class called StreamOioByteChannel which can be used by OIO channel implementation which are Stream based as a starting point.
[#963] Fix invalid free-up of messages if they are only passed-throught in HttpContentEncoder and HttpContentDecoder
[#965] Allow to adjust the SO_TIMEOUT on the fly
Rname StreamOioByteChannel to OioByteStreamChannel
[#957] Netty/Transport/RXTX: Add an optional wait time after opening the serial port but before configuration to allow the serial microcontroller to reset itself after opening.
transport-udt tests should run only when provider class can be loaded and initialized
[#964] ByteBuf.readLine() must return null when no more data is available in ByteBuf
*ChannelBuffer* -> *ByteBuf* and ChannelBuffersTest -> UnpooledTest
Bootstrap thread safety

Changed options and attrs from LinkedHashMap to ConcurrentHashMap to
avoid a possible ConcurrentModificationException if a thread was
adding/removing options/attrs while another was calling Bootstrap.init()
or Bootstrap.duplicate()
[#972] Correctly mark the ChannelPipeline once a ChannelHandler was removed and because of this a buffer was freed
Revert "[#972] Correctly mark the ChannelPipeline once a ChannelHandler was removed and because of this a buffer was freed"

This reverts commit 4ac3bace0f0578f8b84b3d3a2334d36448447f37.
[#976] Fix exception which will be raised by ChannelInboundHandler.discardInboundReadBytes() and ChannelOutboundHandler.discardOutboundReadBytes() if the handler remove it self from the pipeline
[#977] Stop processing messages/bytes in a loop when the handler was removed from the ChannelPipeline