Add Payment entity to batch request and response.
Basic spec to investigate error on Intuit forums https://intuitpartnerplatform.lc.intuit.com/questions/980169-i-got-this-error-when-trying-to-add-tax_applicable_on-field-i-set-the-above-filed-to-credit-but-it-says-its-some-date-class
Merge pull request #158 from minimul/tax-applicable-on

Basic spec to investigate error on Intuit forums https://intuitpartnerpl...
Merge pull request #157 from michaelcheung/master

Add Payment entity to batch request and response.