Do not parallelize 'deploy' step
Do not parallelize 'deploy' step

Helm seems to be flaky when multiple helm upgrades
are being run in parallel. This could be because of
helm's issues itself, or because we are pulling multiple
images at the same time in the cluster.

Regardless, we make 'deploy' run only after all the
image builds have run.

This reverts commit 9b6e05bf60e0f833c0cb2fda510edef6df144c77.
This reverts commit 6cbc36c4ea8a1f0ddb9d3da226ecee8ee8a98352.
This reverts commit 5bf22222bdeb2b48d8b72550021e9ae436d28396.

ryanlovett/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub