Update test_calculator in preparation for release

[Peter-Metz]

Minor changes to make sure all pre-release tests (other than documentation) pass before release

@MattHJensen

[codecov]

Codecov Report

Merging #2404 into master will not change coverage.
The diff coverage is n/a.

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  Coverage     100%    100%           
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  Files          13      13           
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  Hits         2751    2751

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[codecov]

Codecov Report

Merging #2404 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #2404   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           13        13           
  Lines         2751      2751           
=========================================
  Hits          2751      2751           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[Peter-Metz]

After looking into the reason for the need for this PR (i.e. why there is a small difference between some calculated components of itemized deductions and the total amount of itemized deductions), I haven't been able to find a good explanation. However here are some things to consider:

• In the past, the margin or error (or "tolerance") has been adjusted when economic projections are updated (as they are in this case).
• The margin of error disappears for years after 2018.
• In 2017, the margin of error represents a 0.005% difference between the ID component (c19700) and total ID

cc @MattHJensen

[MattHJensen]

Thanks @Peter-Metz for the PR and for investigating the tolerance increase. I am going to merge this so we can get a release out because people are waiting on it. Could you open up an issue in Tax-Calculator about how this sensitivity test needs documentation? I will tackle it when I have an opportunity.