CI: adding email notification

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/Jenkinsfile-gitlab

@@ -285,6 +285,15 @@ pipeline {
             script {
                 // Stage destroy may not be run if error in previous stage
                 sh "./ci-scripts/destroyAllRunningVM.sh --job-name ${JOB_NAME} --build-id ${BUILD_ID}"
+                emailext attachmentsPattern: '*results*.html',
+                     body: '''Hi,
+Here are attached HTML report files for $PROJECT_NAME - Build # $BUILD_NUMBER - $BUILD_STATUS!
+
+Regards,
+OAI CI Team''',
+                     replyTo: 'no-reply@openairinterface.org',
+                     subject: '$PROJECT_NAME - Build # $BUILD_NUMBER - $BUILD_STATUS!',
+                     to: env.gitlabUserEmail
             }
         }
         success {