[ci] Use CI_PROJECT_DIR variable

.gitlab-ci.yml

@@ -10,18 +10,11 @@ include:
 variables:
   GIT_SUBMODULE_STRATEGY: normal
   GIT_SUBMODULE_DEPTH: 1
-  XDG_CONFIG_HOME: tests/config
-
-documentation:
-  before_script:
-    # for opencv-python dependence
-    - apt-get update && apt-get install -y libgl1-mesa-glx > /dev/null
-    - !reference [.snippets, doc-prepare]
+  XDG_CONFIG_HOME: $CI_PROJECT_DIR/tests/data
 
 tests:
   before_script:
-    # for opencv-python dependence
-    - if [ "$TAG" == "docker" ]; then apt-get update && apt-get install -y libgl1-mesa-glx > /dev/null; fi
+    - ls /idiap/resource/database/*
     # for pytorch quirks on linux
     - if [ "$TAG" == "docker" ]; then export OMP_NUM_THREADS=1; fi # Set the number of threads used to 1
     - !reference [.snippets, test-prepare]