Force to use image with Conan 1 because all required packages for building...

Force to use image with Conan 1 because all required packages for building Python are not yet for Conan 2

.gitlab-ci.yml

@@ -44,14 +44,14 @@ workflow:
 
 linux-x86_64:
   extends: [".build"]
-  image: gitlab-registry.synchrotron-soleil.fr/software-control-system/containers/conan-docker-tools/conan-el6-gcc91
+  image: gitlab-registry.synchrotron-soleil.fr/software-control-system/containers/conan-docker-tools/conan-el6-gcc91:1.59.0
   variables:
     NAME: "python-${PYTHON_VERSION}-linux-x86_64"
     PYTHON_ROOT: "${CI_PROJECT_DIR}/${NAME}"
 
 test-x86_64:
   extends: [".test"]
-  image: gitlab-registry.synchrotron-soleil.fr/software-control-system/containers/conan-docker-tools/conan-el6-gcc91
+  image: gitlab-registry.synchrotron-soleil.fr/software-control-system/containers/conan-docker-tools/conan-el6-gcc91:1.59.0
   variables:
     NAME: "python-${PYTHON_VERSION}-linux-x86_64"
   needs: