Add sum of cardinality for array column verifier results

[ShenYi]

For array column mismatch, this change adds additional information
of the total number of elements across all rows for the same column.

Part of #13809

== RELEASE NOTES ==

Verifier Changes
* Add checks for the cardinalities sum when validating an array column.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ shenyi (787a6319ff6fcd40a3665d57e4e399c554fba610)

[mbasmanova]

Looks good to me, but let's have @caithagoras take a look as well.

[mbasmanova]

@ShenYi would you sign EasyCLA?

[ShenYi]

@ShenYi would you sign EasyCLA?

I tried with corporate Facebook, got message "you are not whitelisted...". I have sent a message through the "Contact CLA Manager" link on the same page.

[mbasmanova]

@ShenYi would you sign EasyCLA?

I tried with corporate Facebook, got message "you are not whitelisted...". I have sent a message through the "Contact CLA Manager" link on the same page.

@aweisberg Ariel, is this something you could help with?

[caithagoras]

Conceptually, this PR does 2 things.

• Repurpose OrderableArrayColumnValidator as ArrayColumnValidator
• Add array cardinality in ArrayColumnValidator.

For readability purpose, it would be better to separate it in to 2 commits. You can use interactive rebase to edit multiple commits. In case you're not familiar with this command, here is a reference: https://thoughtbot.com/blog/git-interactive-rebase-squash-amend-rewriting-history

[caithagoras]

@ShenYi @mbasmanova I can see EasyCLA green now.

[caithagoras]

@ShenYi Release notes:
"* Add checks for the cardinalities sum when validating an array column."

[caithagoras]

lgtm % nit

[caithagoras]

Also, Travis seems to be broken, although not relevant to this PR.

[caithagoras]

Please ping on the PR when the comments are addressed, and @mbasmanova will merge for you.

[ShenYi]

@mbasmanova Addressed all the comments.

[mbasmanova]

@ShenYi Ping me when Travis is green and I'll merge.

[caithagoras]

@ShenYi Release notes are only for changes that users / customers sees and cares about, so you can remove the first item, which is a refactoring.

[mbasmanova]

@ShenYi I'm seeing this PR closing and reopening again and again. What's causing this?

[ShenYi]

@mbasmanova test passed and the change is ready to be merged now.

One of the test kept failing due to a bad maven zip from repository during the initial build. All subsequent builds load the same corrupted package from travis cache. Build passed after I manually deleted the maven dependencies for the pull request.

[mbasmanova]

@ShenYi Thank you for the contribution.