Hotfix: Add extra validation case entities don't have uuids associated

## Ready State: YES
Fix the problem that happens because some entities don't have uuids associated with them.
Drupal related issue: https://drupal.org/node/1927474

## Deployment
* Rebuild the `uuid` contrib project from the `drupal-org.make`.

## Test Instructions
When using `imagex_splash_image` its database structure is generated by `eck` and don't use `uuid`, when trying to save the node, `uuid` try looking for database information and throw and error.