clean up workspace before starting

Change-Id: Ib9e0fdb9fbe809a7f1db54777abac6ab3504bfac
diff --git a/jobs.yaml b/jobs.yaml
index 3322621..0ebee25 100644
--- a/jobs.yaml
+++ b/jobs.yaml
@@ -12,7 +12,8 @@
         artifactNumToKeep: -1
     wrappers:
       - workspace-cleanup:
-          - include: "*"
+          include: 
+            - "*"
           dirmatch: true
 
 # ---- Mininet Build and Test Jobs ----
@@ -73,9 +74,6 @@
         This job updates Jenkins jobs automatically when updates are make to the YAML file.
 
         To add or modify a job, look for the "vm-build" project on https://gerrit.onlab.us
-    wrappers:
-      - workspace-cleanup:
-          - exclude: "*"
     scm:
       - git:
           url: ssh://jenkins@gerrit.onlab.us:29418/vm-build
@@ -102,9 +100,6 @@
     name: update-jenkins-verify
     description: |
         This job is used to verify new Jenkins jobs using jenkins-job test before they are accepted in Gerrit.
-    wrappers:
-      - workspace-cleanup:
-          - exclude: "*"
     scm:
       - git:
           url: ssh://jenkins@gerrit.onlab.us:29418/vm-build