#19333 Re-added SubscriptionContainer import for backward compatibility

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/Naaya@20858 a0171fae-0946-0410-966d-b1775066cd26
released 3.3.47, new version 3.3.48

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/Naaya@20859 a0171fae-0946-0410-966d-b1775066cd26