* Return error when genesis time or genesis root is not set
* Merge refs/heads/master into fail-on-unset-fork-digest
* move to own helpers
* make it non public
* Merge branch 'fail-on-unset-fork-digest' of https://github.com/prysmaticlabs/geth-sharding into fail-on-unset-fork-digest
* lint
* fix
* return error
* fix tests and error
* Merge refs/heads/master into fail-on-unset-fork-digest
* first round of test fixes
* second round of fixes
* Merge branch 'fail-on-unset-fork-digest' of https://github.com/prysmaticlabs/geth-sharding into fail-on-unset-fork-digest
* lint
* Merge refs/heads/master into fail-on-unset-fork-digest
* gaz
* Merge branch 'fail-on-unset-fork-digest' of https://github.com/prysmaticlabs/geth-sharding into fail-on-unset-fork-digest