chore : debug + rm useless apt upd

.gitlab/ci/default.gitlab-ci.yml

@@ -35,6 +35,7 @@ variables:
 # This job is here to handle dependencies install package specific dependencies
 .retrieve_deps:apt:
   script:
+    - set -x
     - apt-get update -qq 
     - >
       case $CI_PROJECT_NAME in 
@@ -53,3 +54,4 @@ variables:
         * )
           ;;
       esac
+    - set +x

.gitlab/ci/ubuntu_python.gitlab-ci.yml

@@ -76,11 +76,10 @@ coverage:ubuntu_python:
     - docker
 
   before_script: 
-    - apt-get update
+    - !reference [.retrieve_deps:apt, script]
     - apt-get install -y python-is-python3 python3-pip cmake # cmake for aidge_core tests
     - source venv/bin/activate
     - python -m pip install numpy coverage requests unittest-xml-reporting
-    - !reference [.retrieve_deps:apt, script]
   script:
     - cd ${CI_PROJECT_NAME}
     # Retrieve the installation path of the module, since it is installed with pip.