pgAdmin III: system schemas under incorrect hiearchy in EDBAS PostgreSQL mode

Hi,

If we use pgadmin III to browse a PPAS database that was installed in Postgresql mode, the "sys" and "dbo" system schemas appear incorrectly under the normal user "Schemas" hierarchy. The issue is occurring because the current sql in pgSchemaBaseFactory::CreateObjects() which tries to avoid showing non-system schemas is incorrect.

Since these schemas are added at initdb time, IMO just checking for these schemas by name should be enough. This patch does just the same.

Regards,
Nikhils