Added 1.2.3 dev tag to prepare for release

[axsaucedo]

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[seldondev]

Thu Aug 13 14:37:46 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-2274/1.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-2274 --build=1

[seldondev]

Thu Aug 13 14:38:47 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-2274/2.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-2274 --build=2

[ukclivecox]

/approve

[seldondev]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cliveseldon

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[seldondev]

@axsaucedo: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pr-build	7a83a0b	link	/test this

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