OrchidE 2019.1.6.0: IntelliJ platform 2019.3 support

Version 2019.1.6 of OrchidE now supports IntelliJ platform 2019.3.

Playbooks now supporting the keyword vars: for code completion and the inspection “Undefined Variables”.

• Bugfix: missing keywords “become_exe” and “throttle” of Ansible 2.9 added.
• Bugfix: fix commenter exception “Access is allowed from event dispatch thread only.”