Previously the getMiningCoordinator() function on the
CliquePantheonController returned 'null' as a stub.
In order for the JSON RPC to operate correctly this function needs
to return the mining coordinator created during PantheonController
initialisation - which is the change introduced through this commit.
The Ibft consensus mechanism is responsible for sending a variety of
messages to other validating nodes in the network (provided they have
a point-to-point connection to them).
This change tracks which nodes have connected to the IBFT
subprotocol, and provides the functionality to only transmit messages
to nodes which are also validators.
* comment out the @Option annotation
* eliminate syncModeOptionMustBeUsed
* update to OverrideDefaultValuesIfKeyIsPresentInConfigFile
* unify on comment out approach
The MiningCoordinator has been split into common, and ethhash
specific funcationality.
This adversely affects the JSON RPC, in that all mining related
RPCs are now generic based on the type of miner being used.