Adding support for Oracle named parameters when binding

Signed-off-by: Adam Kalnas <a.kalnas@modcloth.com>

This PR adds support for Oracle named place holders. I couldn't add tests around this since they would fail integration (it is difficult to stand up an Oracle DB in CI due to the proprietary nature).

I think we may also need to change the Rebind function, but wanted to open this up to get early feedback before proceeding any further.