reuse BUILD_DATE if BUILD_TAG is set

.gitlab-ci.yml

@@ -37,9 +37,8 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == "schedule"
 
 .get_build_date: &get_build_date
-  - export BUILD_DATE=$(TZ=America/Chicago date +%Y-%m-%dT%H%M%S)
-  - export FINAL_BUILD_TAG=${BUILD_TAG:-$BUILD_DATE}
-  - echo FINAL_BUILD_TAG=${FINAL_BUILD_TAG}
+  - export BUILD_DATE=${BUILD_TAG:-$(TZ=America/Chicago date +%Y-%m-%dT%H%M%S)}
+  - echo BUILD_DATE=${BUILD_DATE}
 
 .update_ansible_repo: &update_ansible_repo
   - *get_build_date