Improve mounting files to containers

[fedinskiy]

At the moment mounting the file into container looks like this:

            .withProperty("_ignored", "resource_with_destination::/config/|syslog-ng.conf");

which is

1. Quite obscure
2. Too verbose (we usually need just to mount file, witout writing any properties)
3. Easy to break accidentally (yours truly just spend a hour debugging, before noticing that the second ":" is missing)
4. Doesn't allow us to mount a directory or to change a file name
5. Stringly typed

I suggest to look for a appropriate solution, probably as a part of @Container annotation and with a class to describe a required mount