arthur-sync-qa-tools.yaml: update credential type

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: Ia0910d7b4ff26950b7a31f2010dc7a7d24cb40c5
diff --git a/arthur-sync-qa-tools.yaml b/arthur-sync-qa-tools.yaml
index c70b500..f450023 100644
--- a/arthur-sync-qa-tools.yaml
+++ b/arthur-sync-qa-tools.yaml
@@ -28,16 +28,18 @@
 #      - timed: '59 23 * * 7'
     wrappers:
     - credentials-binding:
-      - text:
+      - ssh-user-private-key:
           credential-id: TFA_CI_BOT_USER_SSH_KEY
           key-file-variable: CI_BOT_KEY
           username-variable: CI_BOT_USERNAME
           passphrase-variable: ''
+    - workspace-cleanup
+    - timestamps
 
     builders:
     - shell: |-
         #!/bin/bash
-        
+
         SSH_PARAMS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o PubkeyAcceptedKeyTypes=+ssh-rsa -p 29418 -i ${CI_BOT_KEY}"
         host=${GERRIT_PROJECT#*://}
         GERRIT_HOST=${host%%/*}