Move all configuration files from classpath to docker directories

[folex]

Currently, reference.conf configs, and some application.conf also live inside .jar files. This makes it pretty hard to introspect them in case of some misunderstanding in face of bugs or alike.

Moving them to docker's filesystem would make it easier to read actual configs used by our apps.

[alari]

Looks like a duplicate of #464.

reference.conf files are very handy to have in corresponding modules, but we definitely should get rid of bundling application.conf anywhere -- it should be provided as a volume.

On another hand, reference.conf could be of use iff we call ConfigFactory.load() in the appropriate module, or assume that it's going to be called just like we expect it to be on the end of the world. This way, configuration becomes an obscure aspect of the program.

Let's not move conf files to docker directories. Let's aim to remove all config files from the source tree, and provide only application.conf files in docker volumes (one in node, another one in statemachine).

And reading the actual configs sounds like a different story to config files management, don't you think so?