Feature/onion request refactor

[ThomasSession]

Networking refactor: Separation of concerns, error management, path/snodepool/swarm management, recovery strategies.

[SessionHero01]

I think it's worth to invest in writing unit test for this class, it seems like a good candidate to do so

[SessionHero01]

In junit test, we normally use the test rules to do thing like this. Instead of forcing the test suit to extend from a concrete class, it's more flexible to use a test rule instead. Like this:

class PathManagerTest {
   @get:Rule
   val logRule = MockLoggingRule() // We actually have an existing rule to set up the mock logging

    @Test
    fun myTest() {}
}