4teamwork/opengever.core — pull request #355 by deiferni (2014-07-01 11:32:56+00:00)
Title: Tolerate `OperationalError` in acntions and viewlets.

An `OperationalError` can be raised when DB-migrations are not yet exectued.
We catch and log them in viewlets and actions in order order to access the `@@manage-upgrades` view
to perform these upgrades.

Fixes #352.