Pipeline-to-Pipeline ignores codec

[yaauie]

The Input and Output provided by Pipeline-to-Pipeline can be configured with a codec, but the configuration is ignored; the in-memory event is passed directly from the output to the input.

We should error helpfully if someone attempts to use codecs with these inputs/outputs.

[adelbot]

Yes, i try to use codec in pipeline input.
pipeline to read udp and drop when it's a healcheck message and send to another pipelie with codec cef.
Don't woek because codec in input pipeline seems to be not read.

[yaauie]

@adelbot the pipeline input and output do not use codecs by design, since serialising and deserialising the events through a codec would add significant overhead and noticeably impact performance. The bug reported here is that they don't complain when a codec is specified.