metric fix

Jenkinsfile.eval

@@ -34,10 +34,13 @@ pipeline {
                 copyArtifacts projectName: "s444417-training/${params.BRANCH}/", selector: buildParameter('BUILD_SELECTOR'), optional: true
                 sh 'python3 ./src/evalScript.py'
                 archiveArtifacts 'trainResults.csv'
-                metric = sh (
+                script {
+                    metric = sh (
                         script: 'trainResults.csv',
                         returnStdout: true
                         ).trim()
+                }
+                
             }
         }
     }