Add support for dblib PDO driver in quoteValue()

PDO for MSSQL has 2 drivers available, but only one has been supported in the changes made for ZF2013-03 (quoteValue() must use the driver)

This change just add the support for dblib driver.
Merging PR #4304
Merge branch 'master' of git://github.com/fmarquis/zf2 into fmarquis-master
Merging PR #4304
Merge branch 'fmarquis-master'