Merge branch 'bug/gitlab-runner-mixup' into 'develop'

FIXED separating gitlab runner

See merge request !109

.gitlab/gitlab-ci.yml

@@ -401,8 +401,8 @@ debian_unstable_packaging:
     # path to the intended log directory (cannot be an absolute path)
     PROJECT_LOG_DIR: "packaging-${OS}-${CI_COMMIT_REF_SLUG}/log"
   tags:
-    # packaging unstable image is on the debian:stable runner (debian stable host)
-    - debian:stable
+    # packaging unstable image has its own VM + gitlab runner on the debian:packaging runner (using a debian stable host)
+    - debian:packaging
   stage: package
   script:
     # use the specific script