message: minor: Add Sam Rossi to CREDITS.json
diff: "rassi@mongodb.com"
  ],
  "description": "MongoDB 3.4 feature support, ongoing development/maintenance."
  + },
  + {
  + "name": "Sam Rossi",
  + "email": [
  + "sam.rossi@mongodb.com"
  + ],
  + "description": "GridFS API, ongoing development/maintenance."
  }
  +
  ]
  }
  