* Refactor AttestingIndices to not return any error. Add tests. Add shortcut for fully attested attestation
* attestationutil.ConvertToIndexed never returned error either
* fix test
* remove shortcut
* revert test...
* Remove unused services, mark everything as deprecated, regen pb.go
* remove some code from cluster pk manager, gazelle
* goimports
* remove mocks
* Update WORKSPACE, deprecate old method, stub new method
* Move implementation to ethereumapis definition
* gofmt
* Add TODO for #4952
* Merge branch 'master' into migrate-submitaggregateandproof
* Update validator client to use new submit aggregate and proof method
* Merge branch 'migrate-submitaggregateandproof' of github.com:prysmaticlabs/prysm into migrate-submitaggregateandproof
* gaz
* rename
* rename
* Merge refs/heads/master into migrate-submitaggregateandproof
* Merge refs/heads/master into migrate-submitaggregateandproof
* Merge refs/heads/master into migrate-submitaggregateandproof
* Merge refs/heads/master into migrate-submitaggregateandproof
* Merge refs/heads/master into migrate-submitaggregateandproof
* fix tests
* Merge branch 'migrate-submitaggregateandproof' of github.com:prysmaticlabs/prysm into migrate-submitaggregateandproof