Get the connected dsn string that is now stored when the pdo connection is made
Merge PR #5211
Merge branch 'zf5094' of git://github.com/thepauleh/zf2 into thepauleh-zf5094

* 'zf5094' of git://github.com/thepauleh/zf2:
  Get the connected dsn string that is now stored when the pdo connection is made
Simplification of DSN retrieval from PDO Connection class
Merging PR #5211 to develop
Merge branch 'thepauleh-zf5094' into develop

* thepauleh-zf5094:
  Simplification of DSN retrieval from PDO Connection class
  Get the connected dsn string that is now stored when the pdo connection is made