Add `command_line_arguments` to `TestAction`
Add `command_line_arguments` to `TestAction`

The documentation for `CommandLineArguments` says
> It can either appear on a LaunchAction or TestAction scheme group.

yet, it wasn't included on `TestAction`. This just adds the same code that is defined in `LaunchAction`.
vincentisambart/Xcodeproj,CocoaPods/Xcodeproj