Pass filename as title attribute to content constructor.
Add missing test cases: Test if there's only one journal entry with the filename in the action title.
No longer fire ObjectAddedEvent a second time. createContentInContainer does this already.
Make sure the named_file is already set when the ObjectAdded event gets fired.
Replace mock test cases by functional tests.
Merge pull request #305 from 4teamwork/mle-public_trial_fix_jounral_entries

Originally this PR was meant to fix the double journal entry bug, but the fix lead into several other problems