First try for slack notifications

Author: matthewpwilson

Jenkinsfile

@@ -617,5 +617,11 @@ pipeline {
                 }
             }
         }
+        
+    }
+    post {
+        failure {
+            channel: '@matthew.wilson', message: 'Build failed ${env.JOB_NAME} ${env.BUILD_NUMBER} (<${env.BUILD_URL}|Open>)', tokenCredentialId: 'slack-cics-node-dev'
+        }
     }
 }