Fixed bug that caused the PDO to throw an invalid keyword error
Merging PR #5069
Merge branch 'fix/zend-db-adapter-driver-pdo' of git://github.com/brian978/zf2 into brian978-fix/zend-db-adapter-driver-pdo

* 'fix/zend-db-adapter-driver-pdo' of git://github.com/brian978/zf2:
  Fixed bug that caused the PDO to throw an invalid keyword error
Added some integration tests for PDO driver Statement & Connection class
Merging PR #5069 into develop
Merge branch 'brian978-fix/zend-db-adapter-driver-pdo' into develop

* brian978-fix/zend-db-adapter-driver-pdo:
  Added some integration tests for PDO driver Statement & Connection class
  Fixed bug that caused the PDO to throw an invalid keyword error