Add k8s config and credential
Fix gerrit-trigger and credentials

Change-Id: I038cf98717d7617eb7baf25cd2caceccc1a93908
diff --git a/credentials/infra.yaml b/credentials/infra.yaml
index 32da38e..6e9afca 100644
--- a/credentials/infra.yaml
+++ b/credentials/infra.yaml
@@ -5,7 +5,7 @@
     - credentials:
       - basicSSHUserPrivateKey:
           id: sandbox-jenkins
-          username: sandbox-jenkins
+          username: sandbox
           description: >
             Jenkins Sandbox master SSH key
           privateKeySource:
@@ -48,7 +48,10 @@
               privateKey: ${CRED_SANDBOX_CI_SSH_KEY}
       - usernamePassword:
           id: jjb-update
-          username: sandbox-jenkins
-          password: ${CRED_JJB_UPDATE_PASSWORD}
+          username: sandbox
+          password: password
           description: |
             Credentials to update jenkins-jobs
+      - string:
+          id: k8s-sandbox-token
+          secret: ${CRED_JENKINS_KUBERNETES_TOKEN}