Make visible definition (args) of custom(logger|reporter) to it's base class and decorators

[comdiv]

When i start to implement #1737 - i have found that where is not simple way to make such behavior at BaseLauncher or launcherDecorator level - because they are instanced and used without access to args of customLauncher (reporter) through injector, while it was local for custom factory.

While custom factory is not requied to do something with args they are used just in .ctor method on customer way and then is lost (so it is in karma-firefox-launcher for example).

So while #1737 is based on idea that 'binpath' will be accessible from BaseLauncher - it must be way to supply source definition (from config) to it.
It's not only about #1737 - it can be different scenarios when we could want to modify/setup core launcher/reporter behavior from config for any customLauncher(reporter) of any base type.

Have implement it in my fork and will prepare update soon. I have not found way to do it with injector and made it strait by defining instance variable with special name at factory level and supply null-safe accessor to it at BaseLauncher(Reporter) level.