Summary:Fixes #6314.
When node-haste is officially the package for users to fix the timeout constant, the docs will need to be updated again, but that's a worry for down the line.
Closes https://github.com/facebook/react-native/pull/6328
Differential Revision: D3023114
Pulled By: mkonicek
fb-gh-sync-id: 939cba5f065c1d3bbd2706115a3a704e62975c98
shipit-source-id: 939cba5f065c1d3bbd2706115a3a704e62975c98