Improvements in the mock sentry tests (#1997)

* Improvements in the mock sentry tests

* GenerateChain to return chainpack

* Fix consensus

* Fix core

* Fix core/state

* Fix eth

* Fix eth/download

* Fix eth/fetcher

* Fix eth/filters

* Fix eth/gasprice

* Fix eth/protocols/eth

* Fix tests

* Fix turbo/stages

Co-authored-by: Alex Sharp <alexsharp@Alexs-MacBook-Pro.local>