CRM-16189, added function to validate toggling of deferred revenue ch… (#8572)

CRM-16189, added function to validate toggling of deferred revenue ch… (#8572)

* CRM-16189, added function to validate toggling of deferred revenue check box

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* CRM-16189: Improve support for Accrual Method bookkeeping
  https://issues.civicrm.org/jira/browse/CRM-16189

* CRM-16189, added ts tag for status message

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* CRM-16189: Improve support for Accrual Method bookkeeping
  https://issues.civicrm.org/jira/browse/CRM-16189

* CRM-16189 Added unit test for validateTogglingDeferredRevenue

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* CRM-16189: Improve support for Accrual Method bookkeeping
  https://issues.civicrm.org/jira/browse/CRM-16189

Conflicts:

	tests/phpunit/CRM/Financial/BAO/FinancialAccountTest.php

* --CRM-16189, removed white space

* --CRM-16189, fixed CRM test