Remove inconsistent peers from Session

[dirkmc]

In the case where

• Bitswap sends want-have to a peer
• Peer responds HAVE
• Bitswap sends want-block to peer
• Peer responds DONT_HAVE

Remove the peer from the Session

Depends on https://github.com/ipfs/go-bitswap/issues/259

[Stebalien]

For context: this isn't necessarily malicious as the peer could have lost/removed the content. However, if that's the case, we probably don't want to ask them for anything in the session anyways. Regardless, if this was a mistake, we'll add them back later when we do a random broadcast.

Other thoughts: We might want to keep a badness score and permanently drop peers that keep doing this. But that's a future consideration.