fixing timer in att-wf build job

Change-Id: I161b25dfd2af920422b3509c1aba22cb591d9ceb
diff --git a/jjb/cord-test/att-workflow.yaml b/jjb/cord-test/att-workflow.yaml
index edc8e62..89af3da 100644
--- a/jjb/cord-test/att-workflow.yaml
+++ b/jjb/cord-test/att-workflow.yaml
@@ -53,7 +53,7 @@
          branch: 'master'
          Jenkinsfile: 'Jenkinsfile-attworkflow-build'
          oltDebVersion: 'openolt-master.deb'
-         time: '0 */3 * * *'
+         time: '*/3'
 
       # flex pod1 with olt/onu - seba-1.0/cord-6.1 release
       - 'build_pod_timer':