Provide system properties to set chunk size for each marc record format

Provide system properties for SourceReaderBuilder to set records chunk size for each marc record format (raw, json, xml) correspondingly:

•  "file.processing.marc.raw.buffer.chunk.size" property with 50 size value by default for marc raw format
•  "file.processing.marc.json.buffer.chunk.size" property with 50 size value by default for marc json format
•  "file.processing.marc.xml.buffer.chunk.size" property with 10 size value by default for marc xml format (since the xml format is more redundant the proposed default value has been selected to not exceed "max.request.size" producer parameter which is 1048576 bytes by default)

Miscellaneous: delete payload zipping operation before publishing, update tests