[
  {
    "name": "hostname",
    "default": "localhost",
    "description": "MongoDB server's hostname",
    "validate": {
      "type": ["string", "string[]"],
      "min_items": 1
    }
  },

  {
    "name": "port",
    "default": 27017,
    "description": "MongoDB server's port",
    "validate": {
      "type": ["integer", "integer[]"],
      "minimum": 0,
      "maximum": 65535,
      "min_items": 1
    }
  },

  {
    "name": "username",
    "description": "Username to authenticate to MongoDB server",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "password",
    "description": "Password to authenticate to MongoDB server",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "dbname",
    "description": "Database name",
    "default": "apiengine",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "opts",
    "description": "MongoDB connection options",
    "default": {},
    "dynamic": true,
    "validate": {
      "type": "object"
    }
  }
]

[
  {
    "name": "hostname",
    "default": "localhost",
    "description": "MongoDB server's hostname",
    "validate": {
      "type": ["string", "string[]"],
      "min_items": 1
    }
  },

  {
    "name": "port",
    "default": 27017,
    "description": "MongoDB server's port",
    "validate": {
      "type": ["integer", "integer[]"],
      "minimum": 0,
      "maximum": 65535,
      "min_items": 1
    }
  },

  {
    "name": "username",
    "description": "Username to authenticate to MongoDB server",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "password",
    "description": "Password to authenticate to MongoDB server",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "dbname",
    "description": "Database name",
    "default": "data",
    "validate": {
      "type": "string"
    }
  },

  {
    "name": "opts",
    "description": "MongoDB connection options",
    "default": {},
    "dynamic": true,
    "validate": {
      "type": "object"
    }
  }
]

Change default value of db.mongodb.dbname
Change default value of db.mongodb.dbname
