tests/unit/controllers/tag.py update expected tags

We've added default tags to the database initialisation, so now they
will appear when requesting tags

See #3577
3 jobs for feature-s/init_public_tags in 6 minutes and 2 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test Tools
passed test_tools #184109

00:00:06

 
  Test Unit
passed test_server_unit #184110
web

00:00:18

 
  Test Functional
passed test_server_functional #184111
x86_64 docker

00:05:38