buildPayLoad() is no longer necessary.
Merge branch '8.x' of https://github.com/build2be/drupal-rest-test into 8.x

# Via Martijn Braam
* '8.x' of https://github.com/build2be/drupal-rest-test:
Merge pull request #5 from bertramakers/8.x

buildPayLoad() is no longer necessary in post-rest.php