conform to style guide: metadata_header instead of metadataHeader
conform to style guide: metadata_header instead of metadataHeader
rotemah/tradeoff-analytics-nodejs,watson-developer-cloud/tradeoff-analytics-nodejs,hansb001/tradeoff-analytics-nodejs,hansb001/tradeoff-analytics-nodejs,SidSachdev/tradeoff-analytics-nodejs,watson-developer-cloud/tradeoff-analytics-nodejs,suresh/helio,suresh/helio,rotemah/tradeoff-analytics-nodejs,SidSachdev/tradeoff-analytics-nodejs