fix: Saucelabs tunnel should not be required

[kgress]

PR for issue #20

• Updated ScaffoldBaseTest to not throw another error on top of the called error
• Updated WebDriverManager to not require the tunnel id. Also hardcoded the saucelabs api url.
• Updated the application.properties file to be named application-unit_test.properties.
• Updated the BaseUnitTest to use the "unit_testing" profile