Test endpoint using the set SQL_LOGIN_TIMEOUT value

With this change when the entered endpoint is unreachable Tableau will
warn the user during connection setup instead of proceeding with an
incorrect endpoint and failing during query time. The timeout value set
by Tableau is used when testing the endpoint.
So to better understand this whitespace issue. do I need to use whitespace to separate both standard libraries and modules in the codebase? So something like:

import std...

import odbc....

import presto....