ref(contrib/coreos): clean up time sync

Author: carmstrong

contrib/coreos/user-data.example

@@ -41,26 +41,21 @@ coreos:
       [Service]
       Type=oneshot
       ExecStart=/usr/bin/sh -c 'curl -sSL --retry 5 --retry-delay 2 http://deis.io/deisctl/install.sh | sh -s 1.0.2'
-  - name: ntpd.service
-    command: start
   - name: ntpdate.service
     command: start
-  - name: enable-ntp-synchronization.service
+  - name: timedate-ntp-synchronization.service
     command: start
     content: |
       [Unit]
       Description=Synchronize system clock
-      Before=ntpd.service
+      After=ntpdate.service
 
       [Service]
       ExecStart=/usr/bin/timedatectl set-timezone UTC
       ExecStart=/usr/bin/timedatectl set-ntp true
-      ExecStart=/sbin/hwclock --systohc
+      ExecStart=/sbin/hwclock --systohc --utc
       RemainAfterExit=yes
       Type=oneshot
-
-      [Install]
-      WantedBy=multi-user.target
 write_files:
   - path: /etc/deis-release
     content: |