- Introduced ICredentialsProvider implementations
- Refactored some AbstractConnectorService methods into the credentials providers
- Further simplified the concrete connector services
- made more methods final and explicitly indicated where overrides are allowed, required.
1) Create new ICredentials, ICredentialsProvider, and SuperAbstractConnectorService (temporary)
2) Move most non-password methods to SuperAbstractConnectorService.
3) Rationalize the user of ServerLaunchers.
4) make internalConnect and internalDisconnect abstract.
Updated all subsystem configurations and connector services.
Rewrote login dialog to make password or user id optional.
Rewrote AbstractConnectorService.promptForPassword to take advantage of new configuration parameters.