DB connection handling upgraded to support sqlite fip and new frontier c...

...aching for payloads + other fixes

The connection handling for old and new database has been cleaned. Support for sqlite_fip has been re-added in both old and new systems. For fronTier the caching policy has been set up using the new functions, allowing the never-expiring for payloads. 
In additions, fixes for dictionary auto-loading ( old system ) and extensions of test_gt_load to old database flavor.

Packages:
CondCore/CondDB
CondCore/DBCommon
CondCore/DBOutputService
CondCore/ESSources
CondCore/ORA
CondCore/Utilities