Varbase 8.4.15: Updated [CHANGELOG.md, UPDATE.md] files and filtered the code for Drupal 8 Coding Standard

Varbase 8.4.15 Release notes:

Highlighted important changes since Varbase 8.4.14:

This release fixes security vulnerabilities in Drupal core

• Drupal core - Critical - Multiple Vulnerabilities - SA-CORE-2018-001

No other changes are included, only the SPDX license identifier from GPL-2.0+ to GPL-2.0-or-later.

• Issue #2946845: Updated [Drupal Core] from 8.4.4 to 8.4.5
• Issue #2937949: Changed composer SPDX license identifier from GPL-2.0+ to GPL-2.0-or-later
• Issue #2946846: Varbase 8.4.15: Updated [CHANGELOG.md, UPDATE.md] files and filtered the code for Drupal 8 Coding Standard

Updating Varbase 8.4.14 to Varbase 8.4.15

Same as updating Varbase 8.4.13 to Varbase 8.4.14

The UPDATE.md file.
https://github.com/Vardot/varbase/blob/8.x-4.x/UPDATE.md

Updated Change log file:

https://github.com/Vardot/varbase/blob/8.x-4.x/CHANGELOG.md

Varbase Automated Functional Testing

https://github.com/Vardot/varbase/blob/8.x-4.x/tests/README.md

Varbase Gherkin features

https://github.com/Vardot/varbase/blob/8.x-4.x/tests/features/varbase/RE...