message: Send platform to karma tests
diff: process.env.CHROME_BIN = require('puppeteer').executablePath();
  +const os = require('os');
  +
  +console.log('#######################################################');
  +console.log('PLATFORM', os.platform());
  /**
  * Configure Karma.
  @@ -31,7 +35,8 @@ const configure = (config) => {
  constants: {
  "process.env": {
  'MONGOSH_STITCH_TEST_APP_ID': process.env.MONGOSH_STITCH_TEST_APP_ID,
  - 'MONGOSH_STITCH_TEST_SERVICE_NAME': process.env.MONGOSH_STITCH_TEST_SERVICE_NAME
  + 'MONGOSH_STITCH_TEST_SERVICE_NAME': process.env.MONGOSH_STITCH_TEST_SERVICE_NAME,
  + 'PLATFORM': os.platform()
  }
  }
  },
  