Update .gitlab-ci-before_script.yml

.gitlab-ci-before_script.yml

 before_script:
-  - curl https://code.ornl.gov/rse-deployment/rse-sharables/raw/master/rse-bash-modules.sh?inline=false -O
\ No newline at end of file
+  - curl https://code.ornl.gov/rse-deployment/rse-sharables/raw/master/rse-bash-modules.sh?inline=false -O
+  - source rse-bash-modules.sh
+  - func_rse_docker_cleanup
\ No newline at end of file