Make it compliant with testkit

[bigmontz]

For making it compliant, the driver needs to:

• Implement ForceHomeDatabaseResolution message on TK
• Implement maxHomeDatabaseDelayMs param in NewDriver message on TK.
• Use the cache in verifyAuthentication and verifyConnectivity
• Keep the same database name for the entire session lifetime. This means the onDatabaseNameResolved should be called to signalise the session about the database name even if the resolution was taken from the cache. Otherwise, the session can pick connection to other database if the cache expires or the driver.forceHomeDatabaseResolution get called.