Specify location of logs directory

[boffman]

Is your feature request related to a problem? Please describe.
When running multiple tests in parallell, all logs end up in features/logs/, making it hard to tell which files come from which test

Describe the solution you'd like
An option to grizzly-cli, specifying where logs should be saved for the test, with default value features/logs as it works today

Describe alternatives you've considered
No alternatives :)

Additional context
N/A