Fix common directory in translations
Fix common directory in translations

Partial revert of Icbda5521c97eb8d89a055250fbce045250ba6d55 - we really
need to set the EXCLUDE line.

Add a comment to explain why it's needed.

Change-Id: I01a57ed24a0c276bf74eb66a44bf56da98121a80

Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config