[FEATURE REQUEST] configurable_test_state should be able to return False result in test mode

[nicholasmhughes]

Describe the solution you'd like
The test.configurable_test_state state should be flexible enough to allow for a False result in test mode. This can be useful in testing certain failure conditions or seeing how failure requisites would be triggered without actually invoking the commands.

Please Note
If this feature request would be considered a substantial change or addition, this should go through a SEP process here https://github.com/saltstack/salt-enhancement-proposals, instead of a feature request.