Add no_benefits=False optional argument to Records.cps_constructor

[martinholmer]

The new argument provides Tax-Calculator users with the option of not including benefits information in the Records object. The default when calling recs_large = Records.cps_constructor() is to include benefits in the recs_large object. But if there is no need for benefits information, consider doing this recs_small = Records.cps_constructor(no_benefits=True) to not include benefits information in the recs_small object. The size difference in the two Records objects is considerable:

recs_small    482.5 MegaBytes
recs_large   3487.4 MegaBytes

[codecov-io]

Codecov Report

Merging #1985 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1985   +/-   ##
======================================
  Coverage     100%    100%           
======================================
  Files          38      38           
  Lines        3738    3741    +3     
======================================
+ Hits         3738    3741    +3

Impacted Files	Coverage Δ
taxcalc/records.py	100% <100%> (ø)	⬆️

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