Implementation of inTransaction() in all Zend\Db\Adapter\Drivers
Merge #5747
Merge branch 'master' of git://github.com/jonasdrieghe/zf2 into feature/5747

* 'master' of git://github.com/jonasdrieghe/zf2:
  Implementation of inTransaction() in all Zend\Db\Adapter\Drivers
Closes #5747
Merge branch 'feature/5747' into develop

* feature/5747:
  Implementation of inTransaction() in all Zend\Db\Adapter\Drivers