[BISERVER-7895] Added Vertica Dialects to resolve issue with Datasource
Wizard, Date columns would not appear due to date to timestamp
conversion attempt in the generic dialect.
Merge pull request #8 from wgorman/4.1

[BISERVER-7895] Added Vertica Dialects to resolve issue with Datasource Wizard, Date columns would not appear due to date to timestamp conversion attempt in the generic dialect.