Unique Instance Run

[thomasimda]

Enable a unique instance of the algorithm to be run from a single widget.

User Story: As a widget designer, I want my widget to run a unique instance of the test, even if the test has already been run.

Current Behaviour: Widget calling algo will use the existing result if the test has already been run.

Target Behaviour: Widget calling algo with a "unique_instance" flag will always run a fresh test, even if the test has already been run.