Bump grpc-health and return status immediately

[ecordell]

Description of the change: updates to the newer health check api that has a watch endpoint.

Motivation for the change: keeping up with grpc, but also hopeful that the watch might improve successful connection times (haven't tested yet)

Reviewer Checklist

• [ ] Implementation matches the proposed design, or proposal is updated to match implementation
• [ ] Sufficient unit test coverage
• [ ] Sufficient end-to-end test coverage
• [ ] Docs updated or added to /docs
• [ ] Commit messages sensible and descriptive

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ecordell

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[codecov[bot]]

Codecov Report

Merging #752 (19f3fe2) into master (9960109) will increase coverage by 0.01%. The diff coverage is 0.00%.

:exclamation: Current head 19f3fe2 differs from pull request most recent head ec5934d. Consider uploading reports for the commit ec5934d to get more accurate results

@@            Coverage Diff             @@
##           master     #752      +/-   ##
==========================================
+ Coverage   50.24%   50.25%   +0.01%     
==========================================
  Files         101      100       -1     
  Lines        8691     8689       -2     
==========================================
  Hits         4367     4367              
+ Misses       3471     3469       -2     
  Partials      853      853              

Impacted Files	Coverage Δ
pkg/client/client.go	26.82% <0.00%> (ø)

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[openshift-ci[bot]]

@ecordell: PR needs rebase.

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