Make ctest_python/matlab ci jobs capable to fail the pipeline if unit tests are not all passed.

That was not possible using after_script, the failure status depends on
what's going on in script section.

.gitlab-ci.yml

@@ -36,7 +36,6 @@ stages:
     - conda_pkgs
 
 ctest:
-    <<: *ctest_script
     variables: {SLOW_TESTS: "OFF", BUILD_MULTITHREAD: "ON"} # the CDashConfScript is able to retrieve OpenMP_gomp_LIBRARY and OpenMP_INC_DIR from environment (it's necessary on macOS, so the runner's env. must be configured)
     script:
         - if git log --oneline -n 1 --name-status | grep -E '\s+(src/|misc/test/src/C++)'; then ctest -O ctest.log -S ./CDashConfScript.cmake -j4; else echo 'nothing new to test in C++ code'; fi # C++ tests are executed only if something was modified in C++ lib or C++ tests
@@ -51,9 +50,9 @@ ctest_python:
     before_script:
       # fix strange libomp deadlock happening on pyfaust.hierarchical unit test (because of an env. config. related error)
       - export LD_PRELOAD=/usr/lib64/libomp.so
-    <<: *ctest_script
     variables: {BUILD_WRAPPER_PYTHON: "ON", SLOW_TESTS: "OFF", DONT_PYPLOT_FAUST_TIME: "ON", NOCPPTESTS: "ON", NOPY2: "ON", BUILD_MULTITHREAD: "ON", BUILD_FLOAT_PYX: "ON"} #, GIT_STRATEGY: none}
-    after_script:
+    script:
+      - ctest -O ctest.log -S ./CDashConfScript.cmake -j4 --output-junit junit_output.xml
       - python3 -m venv junit_venv # use default python3 in PATH (the same has been used in ctest building -- cf. CDashConfScript)
       - source junit_venv/bin/activate
       - pip install junit2html
@@ -78,10 +77,10 @@ ctest_python:
 
 
 ctest_matlab:
-    <<: *ctest_script
     variables: {BUILD_WRAPPER_MATLAB: "ON", SLOW_TESTS: "OFF", NOCPPTESTS: "ON", BUILD_MULTITHREAD: "OFF"} # MT OFF because of macOS complicated way to enable OpenMP (but packages are OMP enabled)
-    after_script:
-      # TODO: refactor with ctest_python after script
+    script:
+      # TODO: refactor with ctest_python script
+      - ctest -O ctest.log -S ./CDashConfScript.cmake -j4 --output-junit junit_output.xml
       - python3 -m venv junit_venv # use default python3 in PATH (the same has been used in ctest building -- cf. CDashConfScript)
       - source junit_venv/bin/activate
       - export BUILD_DIR=$(ls -d build_*  | tail -1)