controllerS/files.py: Each sample was attributed to an increasing list of sample set IDs

id_dict was always increasing and was never reset. Thus the last sample were affected to
all the specific sample sets from the previous samples in the form.

Solves #3199
2 jobs for hotfix-s/3199-bug-lors-de-l-ajout-de-samples-a-plusieurs-patients in 11 seconds
Status Job ID Name Coverage
  Test Tools
passed #90444
test_tools

00:00:04

 
  Test Unit
failed #90445
web
test_server_unit

00:00:07

 
Name Stage Failure
failed
test_server_unit Test Unit There is an unknown failure, please try again
Using real prefix '/usr'
New python executable in /home/gitlab-runner/builds/b8d876c1/0/vidjil/vidjil/hotfix-s-3199-bug-lors-de-l-ajout-de-samples-a-plusieurs-patien/bin/python2
Also creating executable in /home/gitlab-runner/builds/b8d876c1/0/vidjil/vidjil/hotfix-s-3199-bug-lors-de-l-ajout-de-samples-a-plusieurs-patien/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.
Running virtualenv with interpreter /home/gitlab-runner/bin/python2
$ source $CI_BUILD_REF_SLUG/bin/activate
$ pip install -r requirements.txt
bash: /home/gitlab-runner/builds/b8d876c1/0/vidjil/vidjil/hotfix-s-3199-bug-lors-de-l-ajout-de-samples-a-plusieurs-patien/bin/pip: /home/gitlab-runner/builds/b8d876c1/0/vidjil/vidjil/hotfix-s-3199-bug-lors-de: bad interpreter: No such file or directory
ERROR: Job failed: exit status 1