Post jenkins updates to Mattermost (#938)

http://b/174603325

Author: Philmod

Jenkinsfile

@@ -131,12 +131,15 @@ pipeline {
   post {
     failure {
       slackSend color: 'danger', message: "*<${env.BUILD_URL}console|${JOB_NAME} failed>* ${GIT_COMMIT_SUMMARY} @kernels-backend-ops", channel: env.SLACK_CHANNEL
+      mattermostSend color: 'danger', message: "*<${env.BUILD_URL}console|${JOB_NAME} failed>* ${GIT_COMMIT_SUMMARY} @kernels-backend-ops", channel: env.SLACK_CHANNEL
     }
     success {
       slackSend color: 'good', message: "*<${env.BUILD_URL}console|${JOB_NAME} passed>* ${GIT_COMMIT_SUMMARY}", channel: env.SLACK_CHANNEL
+      mattermostSend color: 'good', message: "*<${env.BUILD_URL}console|${JOB_NAME} passed>* ${GIT_COMMIT_SUMMARY} @kernels-backend-ops", channel: env.SLACK_CHANNEL
     }
     aborted {
       slackSend color: 'warning', message: "*<${env.BUILD_URL}console|${JOB_NAME} aborted>* ${GIT_COMMIT_SUMMARY}", channel: env.SLACK_CHANNEL
+      mattermostSend color: 'warning', message: "*<${env.BUILD_URL}console|${JOB_NAME} aborted>* ${GIT_COMMIT_SUMMARY} @kernels-backend-ops", channel: env.SLACK_CHANNEL
     }
   }
 }