Update Alibi Detect Server

[ukclivecox]

What this PR does / why we need it:

• Update Alibi Detect Server to use Alibi 0.4.4.
  • This allows usage of more complex drift models that have a preprocessor model. These can be saved and loaded as expected.
• Update Alibi detect server to support V2 dataplane
  • This allows use of Triton inference server

Which issue(s) this PR fixes:

Fixes #2831

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

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[seldondev]

Tue Jan 12 13:33:15 UTC 2021
The logs for [pr-build] [1] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-2832/1.log

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jx get build logs SeldonIO/seldon-core/PR-2832 --build=1

[seldondev]

Tue Jan 12 13:33:17 UTC 2021
The logs for [lint] [2] will show after the pipeline context has finished.
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[ukclivecox]

/test integration

[seldondev]

Tue Jan 12 13:57:28 UTC 2021
The logs for [integration] [3] will show after the pipeline context has finished.
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[axsaucedo]

for consistency do you want to call it v2.http instead of kfserving? Conscious that this is kfserving in executor

[ukclivecox]

done

[axsaucedo]

All looks good! Once protocol updated should be good to merge 👍

[axsaucedo]

Hmm I've seen this issue in another pr ERROR: Could not find a version that satisfies the requirement pandas==1.2.0, it seems to be a dev dependency, so probably the integration tests weren't run when I merged it. We should probably revert #2804.

[seldondev]

Tue Jan 12 17:22:22 UTC 2021
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[seldondev]

Tue Jan 12 17:23:52 UTC 2021
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[seldondev]

Tue Jan 12 17:37:18 UTC 2021
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[seldondev]

Tue Jan 12 17:37:35 UTC 2021
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[axsaucedo]

/test integration
/approve

[seldondev]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: axsaucedo

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[seldondev]

Tue Jan 12 20:35:57 UTC 2021
The logs for [integration] [8] will show after the pipeline context has finished.
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[seldondev]

Tue Jan 12 22:17:42 UTC 2021
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[seldondev]

Tue Jan 12 22:18:13 UTC 2021
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