Merge pull request #2844 from carmstrong/fix-debug_etcd

fix(contrib/coreos): fix debug-etcd service

Author: carmstrong

contrib/coreos/user-data.example

@@ -57,7 +57,6 @@ coreos:
       RemainAfterExit=yes
       Type=oneshot
   - name: debug-etcd.service
-    command: enable
     content: |
       [Unit]
       Description=etcd debugging service