[19.03] Fix regression when targeting an old docker engine #2536

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silvin-lubecki wants to merge 3 commits intodocker:19.03from silvin-lubecki:fix-version-old-engine

Commits on May 19, 2020

Partially revert cf663b5 as it breaks the version negotiation with an older docker engine.
silvin-lubecki
committed

Commits on May 20, 2020

Add a new Makefile variable to override DockerInDocker engine version we use to run e2e tests
silvin-lubecki
committed
Run e2e tests with different engine version on Jenkins
silvin-lubecki
committed