When the association between a tag and an entry is removed, if the tag doesn’t have other entries, we can remove it.
Also add more tests for that part and ensure TagControllerTest is isolated from the rest of the test suite (finally!)
Instead of using a HTTP request we just login user like FOSUser does.
It allows us to mock service in container for functional tests.
Also, fix a bad config name in fos_user for firewall
And finally, add functional test to PocketImport