fix(p2p): implement retry mechanism for Head request

[vgonkivs]

Head method should have its default timeout for all requests(if it wasn't set) and in case we receive less than 3/4 of a positive response, we should ask more peers to determine the current Head.
Note: we should implement retry only for tracked peers. For the trusted peers - only timeout will be enough.

[AryanGodara]

This one was mentioned in #152, so is this issue partially completed now?

[Wondertan]

No, this is a follow-up issue from that PR. Unfinished work that deferred for later, but you are free to give it a try!

[AryanGodara]

Agreed. @AryanGodara, I suggest looking at #149 instead

Thanks, @Wondertan! I'd very much like to work on this issue :)
I can get started with it only on Monday, though :(
In the meantime, could you please assign this one to me?