Allow users to specify chrome.switches in client properties

[kood1]

ChromeDriver allows users to set the chrome.switches via DesiredCapabilities. Current, our client properties doesn't support configuring chrome.switches. We should allow users to specify list of chrome.switches via client properties file to apply to ChromeDriver instances.

https://sites.google.com/a/chromium.org/chromedriver/capabilities

[kood1]

We can apply this via creating custom SessionFactory. Refer to this Google group topic for creating a custom SessionFactory posted by @lathanagaraj :

https://groups.google.com/forum/#!topic/jtaf-extwebdriver/TKtOpmIPP-Q