[ready-for-core-team-review]CRM-16189, added function to create deferred transactions...

[ready-for-core-team-review]CRM-16189, added function to create deferred transactions (#8579)

* CRM-16189, added function to create deferred transactions

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

Conflicts:
	CRM/Core/BAO/FinancialTrxn.php

* CRM-16189, updated function

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

Conflicts:
	CRM/Core/BAO/FinancialTrxn.php

* CRM-16189, fixed Jenkin errors

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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 createDeferredTrxn function

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

* CRM-16189 Resolved jenkins errors

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

* CRM-16189 Removed count since individual test passes but multiple tests do not clear the db

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

* CRM-16189 Added params to unit test to avoid clashing with results from other test

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

* CRM-16189 Removed unintentional rebase code

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