Zachary Tong 59191b4998
[Rollup] Replace RollupIT with a ESRestTestCase version (#31977)
The old RollupIT was a node IT, an flaky for a number of reasons.
This new version is an ESRestTestCase and should be a little more robust.

This was added to the multi-node QA tests as that seemed like the most
appropriate location.  It didn't seem necessary to create a whole new
QA module.

Note: The only test that was ported was the "Big" test for validating
a larger dataset.  The rest of the tests are represented in existing
yaml tests.

Closes #31258
Closes #30232
Related to #30290
2018-07-16 10:47:46 -04:00
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