Katib: Add make check to travis

[gyliu513]

/kind bug

What steps did you take and what happened:
[A clear and concise description of what the bug is.]

There are often some errors for make check, it is better to put the checking to CI.

Related issues for make check at https://github.com/kubeflow/katib/pull/606

/cc @hougangliu @gaocegege @richardsliu

What did you expect to happen:

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Kubeflow version:
• Minikube version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[gyliu513]

@hougangliu not clear how to enable make check in katib prow at https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubeflow/kubeflow-presubmits.yaml#L82-L92 , do you have any comments for this?

kubeflow/katib:
  - name: kubeflow-katib-presubmit
    always_run: true         # Run for every PR, or only when requested.
    branches:
    - master
    labels:
      preset-service-account: "true"
    spec:
      containers:
      - image: gcr.io/kubeflow-ci/test-worker:latest
        imagePullPolicy: Always

[hougangliu]

you can follow how "run-tests" enabled

[johnugeorge]

What do you mean by enabling in prow? You mean, in presubmit workflow? Alternate solution is to add gometalinter in travis

[gyliu513]

@johnugeorge I mean adding this to CI, so that the CI will run make check to help us detect some coding issues.

[gaocegege]

@gyliu513 Maybe we could add make check in Travis.

@johnugeorge gometalinter is not maintained any more.

[gyliu513]

@gyliu513 Maybe we could add make check in Travis.

@gaocegege seems adding to travis is more simple, let me fix this in travis instead.

[johnugeorge]

LGTM