As a developer, I need to have extensive set of tests for p2p, so I can see regressing while improving/modifying code

[akoptelov]

• Fix existing p2p tests
• Make sure existing p2p tests work with webrtc version
• Add discovery tests
• Add rpc tests
• Add identify tests
• Add pubsub tests
• TODO

[akoptelov]

UPD. Existing p2p tests now work with new libp2p

[akoptelov]

UPD.
Working on p2p-specific testing crate that runs only p2p statemachine/servces. That means that test have the full control on RPCs (and pubsub in future) it sends.

[akoptelov]

UPD.
Identify base test is ready, working with RPCs

[akoptelov]

UPD. Working with Kademlia tests. Blocker now is #341