SeLion-Grid 1.2.0-SNAPSHOT downloads but does not extract geckodriver

[Doug Simmons]

Affects version(s)

• develop-1.2.0 branch
• develop branch

Problem description

1. The geckodriver package is properly downloaded to <selionHome>/downloads/
2. The geckodriver artifact should also be extracted to <selionHome>/

[Doug Simmons]

This also will need to be fixed for 2.0.0