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Simplify onSetup check for configuration

Description

Simplify onSetup check for configuration

  • No need for isset(), because these are created by default. If they were unset somehow, the run-time warning for that should not be hidden.
  • No need to check DBname. Optional.
  • Fix BagOStuff typehint.

Ref T180192.

Change-Id: Idd64e1811fbfb88302769a568369c58e66b5fa03