ansible: Don't expect ssh key update script to exits externally

ansible/files/known_hosts.service

@@ -8,4 +8,4 @@ RefuseManualStop=yes
 
 [Service]
 Type=oneshot
-ExecStart=/root/deploy/bin/get_ssh_hosts
+ExecStart=/usr/sbin/get_ssh_hosts

ansible/roles/pds_deb/tasks/main.yml

@@ -58,6 +58,12 @@
   notify:
     - restart nscd
 
+- name: known_hosts update script
+  copy:
+    src: ../bin/get_ssh_hosts
+    dest: /usr/sbin
+    mode: a=rx
+
 - name: known_hosts update service files
   copy:
     src: '{{item}}'