QE+QMCPACK Converter Update February 2020 (#15135)

* Add a variant to QE that suppresses upstream patching. Need in order to do ddependency patching.

* QE variant fails to build often. Set default variant to False as a user friendly change.

* QMCPACK converter patch collides with internal QE patches. Deactivate internal patches when performing dependency patching.

* Clearer description of QE patch variant that is also flake8 compliant.