[data][gitlab-ci] Add support for yum requirements in test phase

bob/devtools/data/gitlab-ci/single-package.yaml

@@ -84,6 +84,7 @@ build_linux_38:
     PYTHON_VERSION: "3.8"
     BUILD_EGG: "true"
   script:
+    - if [ -f "${CI_PROJECT_DIR}/conda/yum_requirements.txt" ]; then /usr/bin/sudo -n yum -y install $(cat ${CI_PROJECT_DIR}/conda/yum_requirements.txt); fi # [linux]
     - bdt ci build -vv
     - bdt ci readme -vv dist/*.zip
     - bdt ci clean -vv