vertica support is broken

[adrean]

I've realized that the vertica support has been broken for some time now because of at least 2 changes in the vertica-python library:

• using kwargs for connection : Use kwargs vertica/vertica-python#69
• rowcount implementation : https://github.com/uber/vertica-python#rowcount-oddities

Those changes came in version 0.5.x of vertica-python

I've a fork and I'd be happy to contribute with a PR. I'll check first that there are not other changes that broke the support.

[JohnMurray]

Hey @adrean! Just checking to see if you still wanted to open a PR. I don't use vertica often, so if this is still a problem, please do contribute your fixes.