When using action_validate, true is returned even when the script is not a valid script.
Steps to reproduce:
1) Login as amadmin
2) Navigate to API descriptor -> scripts (openam/XUI/#api/explorer/scripts)
3) Select "/scripts#1.1_action_validate"
4) Use valid payload like:
Note: script is base64 encoded source code in this case
5) Click "Try it out!"
6) Observe successful validation
Validation is successful.