Fix/Update Discovery example
Fix/Update Discovery example

Kademlia was somewhat silently failing whenever there were nodes using
ids of different sizes (bit lengths).

Now the discovery example runs in constant memory even for 50 nodes on a
single machine (have not tested any higher values).

input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,serokell/tw-rework-sketch,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype