James E. Blair 2433993b70 Add test docker image build jobs
Moving the intermediate image pulls to the image build job is a
substantial change, so let's test it first before we commit it
to production.

Change-Id: Ic4b43fa4976692bb58908a25e3b1a2e06d9ef637
2020-02-27 06:54:47 -08:00
..
2020-02-27 06:54:47 -08:00
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