If the user does not get the URL correct in both
the Test Driver and Connect Using dialogs, the
user is told that the problem is that there is no
suitable driver (actual error messages below). 

This is a red herring that may make the user waste
time on trying to install a "suitable" driver
instead of focusing on the real problem, which is
the URL. 

The Connect Using error message is somewhat better
because it points out that the problem may be the
URL, user or password. However, the final wording
in the message detracts from the real problem.

Test Driver Error Message:
Unable to perform action. No suitable driver.

Connect Using Error Message:
Unable to obtain schema. 
There is insufficient information to establish a
connection to obtain list of schemas. Check
database URL, user and password.
Driver message: cannot establish a connection to
jdbc:mysql: using com.mysql.jdbc.Driver (No
suitable driver)