vidjil_utils.py init_db_helper fix var ref

See #3577
3 jobs for feature-s/init_public_tags in 24 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test Tools
passed #183948
test_tools

00:00:06

 
  Test Unit
failed #183949
web
test_server_unit

00:00:18

 
  Test Functional
skipped #183950
docker x86_64
test_server_functional
 
Name Stage Failure
failed
test_server_unit Test Unit
Makefile:40: recipe for target 'unit_server' failed
make: *** [unit_server] Error 2
make: Entering directory '/home/gitlab-runner/builds/37bfe3c4/0/vidjil/vidjil/server'
pkill -f fuse_server.py
make: Leaving directory '/home/gitlab-runner/builds/37bfe3c4/0/vidjil/vidjil/server'
Uploading artifacts...
server/web2py/test-reports/TEST*xml: found 16 matching files
Uploading artifacts to coordinator... ok
id=183949 responseStatus=201 Created token=QUeevDDm
ERROR: Job failed: exit status 1