Implement remaining sales report feature

[gbenziv]

xxxx

• Implemented get yesterday's sales API
• Implemented get this month's sales API
• Changed bdate format

Pull Request Checklist

• [x] I have ensured that my commit message contains the Issue ID.
• [x] I have ensured that my commit message contains the feature/bugfix description.
• [x] I have updated the documentation accordingly.
• [x] I have ensured my code follows the coding guidelines.
• [x] I have ran lint in my code locally prior to submission.
• [x] I have built my changes in local successfully.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #242 (484df13) into master (83cbce2) will increase coverage by 0.06%. The diff coverage is 100.00%.

:exclamation: Current head 484df13 differs from pull request most recent head 9a99493. Consider uploading reports for the commit 9a99493 to get more accurate results

@@            Coverage Diff             @@
##           master     #242      +/-   ##
==========================================
+ Coverage   95.47%   95.53%   +0.06%     
==========================================
  Files          65       65              
  Lines        1303     1321      +18     
==========================================
+ Hits         1244     1262      +18     
  Misses         59       59              

Impacted Files	Coverage Δ
core/domain/unittest/test_empmgmt.cpp	95.62% <ø> (ø)
core/validator/personvalidator.hpp	100.00% <ø> (ø)
core/domain/accounting/accountingcontroller.cpp	87.50% <100.00%> (+2.31%)	:arrow_up:
core/domain/unittest/test_accounting.cpp	100.00% <100.00%> (ø)
core/domain/unittest/test_customermgmt.cpp	100.00% <100.00%> (ø)
utility/datetime/datetime.hpp	100.00% <100.00%> (ø)

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