Fix variable assignment

ci-templates/industrial-ci-templates.yml

@@ -14,7 +14,7 @@
     PARALLEL_BUILDS: 2 # keep this for now, since there seems to be memory limit issues in the ci VM
     AFTER_SETUP_TARGET_WORKSPACE: "rosenv && bash <(curl -Ls https://git.code.tecnalia.com/tecnalia_robotics-public/gitlab_templates/raw/master/scripts/ci_run_entry_points.sh) $$current_ws"
     CMAKE_ARGS: -DCMAKE_CXX_FLAGS=-Wno-ignored-attributes -Wno-int-in-bool-context
-    NOT_TEST_BUILD: true
+    NOT_TEST_BUILD: "true"
     DOCKER_COMMIT: "${ARTIFACT_DOCKER_URL}/flexbotics-industrial-ci:${CI_COMMIT_SHORT_SHA}"
 
 industrial_ci_test_noetic: