* make fixes
* change condition
* comment
* fixed up a few var names for clarity
* added test for isDescendant
* chain split reorg test
* interface for atts service
* comprehensive reorg regression test added
* space
* all tests pass
* target handler
* ci lint
* Update beacon-chain/sync/receive_block.go
Co-Authored-By: rauljordan <raul@prysmaticlabs.com>
