Javadoc
Sets properties that will be passed on to the driver.
The properties handle should contain a list of arbitrary string tag/value pairs
as connection arguments; normally at least a "user" and "password" property
should be included. Failure to include the user or password properties will make the
pool copy the values given in config.setUsername(..) and config.setPassword(..).
Note that the pool will make a copy of these properties so as not to risk attempting to
create a connection later on with different settings.