Implement browserstack local testing modifiers

[lazytesting]

See the list of modifiers for BrowserStack local testing, it's useful to add an option to pass them via WbTstr.Net as well.

-v - Provides verbose logging. Set this flag to debug issues with setting up a connection.
-f - Required if testing a local folder.
-h - Display the help file for setting configuration options.
-version - Displays the current version of the binary.
-force - Kill other running instances of BrowserStack Local.
-only - Restricts Local Testing access to specified local servers and/or folders.
-forcelocal - Route all traffic via local machine.
-onlyAutomate - Setup Local Testing only for Automate. When this flag is set, Local Testing connections set up with a binary cannot be used for Live, Screenshots or Responsive.
-proxyHost HOST - Hostname/IP address of the proxy server. If this flag is not set, the remaining proxy options are ignored.
-proxyPort PORT - Port for the proxy server. Defaults to 3128.
-proxyUser USERNAME - Username for connecting to the proxy server (Basic Auth only).
-proxyPass PASSWORD - Password for connecting to the proxy server (Basic Auth only). If the -proxyUser flag is not set, -proxyPass will be ignored.
-localIdentifier STRING - Specify a unique identifier for each connection, while creating multiple Local Testing connections.

There are 2 solutions:

1. create implementation for each of the modifiers
2. make it possible to pass parameters in a more generic way
   By example with something like: .SetArgument("-v" , "true")
   this last option might be useful for the other drivers as well but is a bit less user friendly