old_contents: module.exports = {
    CONTAINERS: {
      TEST: {
        MONGODB: {
          image: 'mongo:3.2.0',
          name: 'esn-test-mongo',
          port: ['27017']
        },
        REDIS: {
          image: 'redis',
          name: 'esn-test-redis',
          port: ['6379']
        },
        ELASTICSEARCH: {
          image: 'elasticsearch:2.3.2',
          name: 'esn-test-es',
          port: ['9200']
        },
        RABBITMQ: {
          image: 'rabbitmq:3.6.5-management',
          name: 'esn-test-rabbit',
          port: ['5672']
        }
      }
    },
  
    DOCKER_HOST: '172.17.0.1',
  };
  
new_contents: module.exports = {
    CONTAINERS: {
      TEST: {
        MONGODB: {
          image: 'mongo:3.4.13',
          name: 'esn-test-mongo',
          port: ['27017']
        },
        REDIS: {
          image: 'redis',
          name: 'esn-test-redis',
          port: ['6379']
        },
        ELASTICSEARCH: {
          image: 'elasticsearch:2.3.2',
          name: 'esn-test-es',
          port: ['9200']
        },
        RABBITMQ: {
          image: 'rabbitmq:3.6.5-management',
          name: 'esn-test-rabbit',
          port: ['5672']
        }
      }
    },
  
    DOCKER_HOST: '172.17.0.1',
  };
  
subject: use mongo 3.4.13