Update ableton-utils to 0.28.x

Jenkinsfile

@@ -5,7 +5,7 @@
  * license that can be found in the LICENSE file.
  */
 
-library(identifier: 'ableton-utils@0.23', changelog: false)
+library(identifier: 'ableton-utils@0.28', changelog: false)
 library(identifier: '[email protected]', changelog: false)
 // Get groovylint library from current commit so it can test itself in this Jenkinsfile
 library "groovylint@${params.JENKINS_COMMIT}"
@@ -83,10 +83,8 @@ devToolsProject.run(
             'GMETRICS_VERSION=test',
             'SLF4J_VERSION=test',
           ]) {
-            try {
+            junitUtils.run(testResults: 'results.xml') {
               sh 'python -m pytest --junit-xml=results.xml'
-            } finally {
-              junit 'results.xml'
             }
           }
         },