Cannot find module for path ml_metadata/metadata_store/mlmetadata

[Ark-kun]

https://travis-ci.com/kubeflow/pipelines/jobs/182659416

go: downloading github.com/valyala/bytebufferpool v1.0.0
build github.com/kubeflow/pipelines/backend/src/apiserver: cannot find module for path ml_metadata/metadata_store/mlmetadata
The command "go vet -all -shadow ./..." exited with 1.
0.48s$ go test ./...
build github.com/kubeflow/pipelines/backend/src/apiserver: cannot find module for path ml_metadata/metadata_store/mlmetadata
The command "go test ./..." exited with 1.

[neuromage]

@Ark-kun can you rebase on master? The backend now requires bazel to build. go build/vet/test etc will no longer work.

[Ark-kun]

Turns out, just doing git commit --amend && git push --force (without any changes) was enough to fix the issue. The root cause is described here: #929