Update SQLServer2008Platform.php

Added support of  maps a Doctrine datetimetz type to a MS SQL SERVER type datetimeoffset(6)
Update SQLServer2008Platform.php

datetimeoffset(6) to DATETIMEOFFSET(6)
Update SQLServer2008Platform.php

Added support of  maps a Doctrine datetimetz type to a MS SQL SERVER type datetimeoffset(6)
Merge branch 'master' of https://github.com/valerio8787/dbal
remove unused use statements
Merge pull request #324 from valerio8787/master

Update SQLServer2008Platform.php (support  MS SQL Server type datetimeoffset(6))