add example for custom metrics in feedback

[RafalSkolasinski]

This adds example related to issue #315

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[seldondev]

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[seldondev]

Fri Jan 24 14:33:40 UTC 2020
The logs for [lint] [2] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1366/2.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1366 --build=2

[seldondev]

Fri Jan 24 14:33:53 UTC 2020
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-1366/1.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1366 --build=1

[axsaucedo]

Looks good - just make sure to add the nblink and jupyter reference in the docs.

[adriangonz]

/approve

@axsaucedo that should be already there in https://docs.seldon.io/projects/seldon-core/en/latest/examples/tmpl_model_with_metrics.html

From my side the only change would be to move it to Kind, but I realise that's outside the scope of this issue and should be tackled as part of #1256 instead.

[seldondev]

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[seldondev]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adriangonz

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[seldondev]

Mon Jan 27 14:16:13 UTC 2020
The logs for [pr-build] [3] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1366/3.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1366 --build=3

[seldondev]

Mon Jan 27 14:16:26 UTC 2020
The logs for [lint] [4] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1366/4.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1366 --build=4

[seldondev]

failed to trigger Pull Request pipeline

• failed to create agent
• failed to calculate in repo config
• failed to load trigger config for repository SeldonIO/seldon-core for ref 519cc3b
• failed to find any lighthouse configuration files in repo SeldonIO/seldon-core at sha 519cc3b
• failed to process repo SeldonIO/seldon-core refref 519cc3b
• failed to list files in directory /var/tmp/gitrepo660600678/.lighthouse
• open /var/tmp/gitrepo660600678/.lighthouse
• no such file or directory