Unit test ZendTest\Db\Adapter\Driver\Pdo\ResultTest::testCurrent() tests current() returns consistent results

Zend\Db\Adapter\Driver\Pdo\Result::current() fix to prevent calling resource::fetch() on multiple calls

Patch for
fix formatting
Add license and comments
PR #5457, Fixes #5454
Merge branch 'zf5454' of git://github.com/ChrisSchreiber/zf2 into ChrisSchreiber-zf5454

* 'zf5454' of git://github.com/ChrisSchreiber/zf2:
  Add license and comments
  fix formatting
  Unit test ZendTest\Db\Adapter\Driver\Pdo\ResultTest::testCurrent() tests current() returns consistent results
Removed unnecessary whitespace in Pdo\Resultphp
Merging PR #5457 to master
Merge branch 'ChrisSchreiber-zf5454'

* ChrisSchreiber-zf5454:
  Removed unnecessary whitespace in Pdo\Resultphp
  Add license and comments
  fix formatting
  Unit test ZendTest\Db\Adapter\Driver\Pdo\ResultTest::testCurrent() tests current() returns consistent results