Add option to drop the caching tables from the database and exit

Authored by vanmeeuwen on Jun 26 2018, 3:41 PM.

Description

Add option to drop the caching tables from the database and exit

Summary:
This can be used to enforce the regeneration of the caching tables with the latest database schema - for instance, by the package manager when upgrading the PyKolab package.

This patch complements D587 in an attempt to fix T2274.

Reviewers: PyKolab Developers

Maniphest Tasks: T2274

Differential Revision: https://git.kolab.org/D593