Test roll bug2

[godber]

This isn't meant to be merged, it's just here as a convenience for testing:

terascope/elasticsearch-assets#970

[codecov]

Codecov Report

Merging #3329 (e974814) into master (2b9fc76) will decrease coverage by 26.30%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #3329       +/-   ##
===========================================
- Coverage   76.80%   50.50%   -26.31%     
===========================================
  Files         745      572      -173     
  Lines       23012    17495     -5517     
  Branches     4232     3162     -1070     
===========================================
- Hits        17675     8836     -8839     
- Misses       4842     8433     +3591     
+ Partials      495      226      -269     

Impacted Files	Coverage Δ
...ponents/src/operations/shims/operation-api-shim.ts	0.00% <0.00%> (-100.00%)	⬇️
...s/src/operations/shims/legacy-slice-events-shim.ts	5.55% <0.00%> (-94.45%)	⬇️
...ackages/teraslice-op-test-harness/lib/operation.js	4.91% <0.00%> (-91.81%)	⬇️
packages/job-components/src/operations/slicer.ts	9.52% <0.00%> (-85.72%)	⬇️
packages/data-mate/src/column/Column.ts	11.42% <0.00%> (-84.29%)	⬇️
...ackages/data-mate/src/data-frame/metadata-utils.ts	10.81% <0.00%> (-83.79%)	⬇️
packages/utils/src/big-map.ts	3.94% <0.00%> (-82.90%)	⬇️
...ponents/src/operations/shims/legacy-reader-shim.ts	14.70% <0.00%> (-82.36%)	⬇️
packages/data-mate/src/data-frame/DataFrame.ts	3.51% <0.00%> (-82.12%)	⬇️
packages/data-types/src/graphql-helper.ts	18.75% <0.00%> (-81.25%)	⬇️
... and 576 more

[godber]

Actually, I think we should modify and merge this. However, lets not overwrite any of the existing files. Lets move all of these changes into a subdirectory like examples/multiple-es-clusters and adapt the files so they run in place there. It will be useful to have a more complex/realistic example laying around.

[godber]

I think we've got all of the good stuff out of this PR, I'm going to close it.