MQE-818: Enable executeJS to save a variable

[KevinBKozan]

Description

• executeJS now assigns a variable for storage.

Fixed Issues (if relevant)

1. Test validation errors in error with 3.2.1 #818: Enable executeJS to save a variable

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/verification tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)
• Changes to Framework doesn't have backward incompatible changes for tests or have related Pull Request with fixes to tests

[coveralls]

Coverage increased (+0.04%) to 52.482% when pulling 3f256fc on MQE-818 into 0794a74 on develop.