Backport container CI environments to Ocata

Backport container CI environments to Ocata

Merging change I8361bc8be442b45c3ef6bdccdc53598fcb1d9540 broke the
upgrade jobs from Ocata to Pike, as until now we've been taking the
scenario files from Pike when they were undefined in Ocata, but this
obviously stops working when they reference other files that are also
undefined in Ocata (like all-nodes-validation-disabled.yaml).

Backporting the scenarios and required files to Ocata should solve
these kinds of issues, but will make managing the scenarios, which are
still in emerging state, slightly more difficult.

Change-Id: I8a54cf984f41b5e21cf1c4a667da5b8f135ffb15
Closes-Bug: #1703391