Add T1 Offload test to RAN-Container-Parent

ci-scripts/Jenkinsfile-GitLab-Container

@@ -338,6 +338,26 @@ pipeline {
             }
           }
         }
+        stage ("Test T1 Offload") {
+          when { expression {doMandatoryTests} }
+          steps {
+            script {
+              triggerSlaveJob ('RAN-T1-Offload-Test', 'Test-T1-Offload')
+            }
+          }
+          post {
+            always {
+              script {
+                finalizeSlaveJob('RAN-T1-Offload-Test')
+              }
+            }
+            failure {
+              script {
+                currentBuild.result = 'FAILURE'
+              }
+            }
+          }
+        }
       }
     }
     stage ("Images Push to Registries") {