* [rpc] fix some test cases
* fix test cases
* [rpc] use harmony/eth/rpc for customized changes
* [RPC] replace one more use of RPC at accounts module
* [RPC] fix test cases
* [sync] further refactor the underlying code of sync rpc, make the sync status update every 6 seconds
* [SYNC] recover some unexpected comment change because of refactoring
* [rpc] add some tolerance of 10 to inSync and beaconInSync
* fix typo
* [sync] better name
* fix the data race under intensive sync status call
* [sync] fix the intensive call with double lock. Fix bug of dead lock
* remove one test message
* [rpc] updated rpc to GetCirculationSupply to sub token burnt
* [explorer] add a small fix
* [rpc] fix at getInaccessible tokens
* [rpc] added fix at header.Root
* [explorer] added a lot of code
* [explorer] added a lot of code
* [explorer] more adding
* [explorer] clean up and more code added
* [explorer] fixes according to test results
* [explorer] changed leveldb params, batch size, and a dirty data fix
* [explorer] fix on dirty data, fix on HasPendingTasks, and increase worker number
* [explorer] fix for contract creation
* [explorer] fixed local travis test
* [explorer] added caching fix at flushing db.
* [explorer] fixed all rpc points
* [explorer] small change to refactor storage.Start
* [explorer] fix go test
* [explorer] further increase the batch size
* [explorer] release lock during db writing data
* [explorer] change to rlock/runlock at flushLocked
* [explorer] also add flush time mechanism to trigger flushing
* [explorer] when checking checkpoint, first check memory, then check db
1. Added some functionality to HostV2 for stream support.
2. Added new module discovery under p2p host to replace the networkInfo service.
3. Make dht datastore badger only active on bootstrap nodes. For normal nodes, badger is disabled by default. It can also be enabled by flags.
Co-authored-by: Rongjian Lan <rongjian.lan@gmail.com>
1. Refactored service manager with cleaner interface.
2. Add prometheus to the service manager.
3. Graceful shutdown of the services (including consensus).
4. Some code refactor regarding consensus graceful shutdown.
Co-authored-by: Rongjian Lan <rongjian.lan@gmail.com>