Change parity_pendingTransactions and ParityTransaction to support nu…

…ll values in serialized string

add tests

ParityTxTraceFromStore fix BlockNumber serialization to decimal (Neth…

…ermindEth#1373)

* ParityTxTraceFromStore fix BlockNumber serialization to decimal

* Fix BlockForRpc serialization for different engines

* Fix issue adding Raw number format.

Remove ParityTxTraceFromStore as its not needed.

* fix tests

test updates for parity trace rewards

reward in parity tracers

Fresh connect (NethermindEth#1371)

* prefer fresh when connecting

* just logs and comments

* test fix

* decreased connection timeouts

step failures logging

test fix

Aura fixes for ReadOnly state (NethermindEth#1360)

* 1. Move GetValidators to ReadOnly states as they shouldn't change them. This is done in order not to touch state and have to recalculate StateRoot when invoking GetValidators. This is also in-line with Parity implementation.

2. Create separate AuRaRewardCalculator for producing blocks to move it to ReadOnly state. This caused state hash missmatch on POA Core (interestingly not on other networks).

* Fix tests

* simplified readonlychain

* cleanup

* a bit more readability

* removed unused dependency

* removed unused parameter

* StateProvider Reset test

* Change ITransactionProcessorFactory to IReadOnlyTransactionProcessorSource.

Add IRewardCalculatorSource for RPC.

* Fix start producing from block 1 on first validator in chain.

* Add & fix tests

* Fix CanPpoduce  block

* Fix EthereumTests

Co-authored-by: Tomasz Kajetan Stańczak <[email protected]>

added dirichlet in secp