feat: support message payload file in kafka-producer-performance #2212
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Add support to kafka-producer-performance to read messages from a text file instead of generating random ones. The format of the "message-file" can be one of "raw" (default), "hex" or "base64". Messages will be built cyclically from the message file lines and if the file size is greater than the "message-load" only the first n lines will be taken.