executable bit should not be set on systemd service files

roles/slurm-common/tasks/installMungeFromSource.yml

@@ -39,7 +39,7 @@
   when: use_systemd is not defined
 
 - name:  copy slurm init script if OS contains systemd
-  template: dest=/etc/systemd/system/munge.service src=munge.service.j2 mode=755
+  template: dest=/etc/systemd/system/munge.service src=munge.service.j2 mode=644
   sudo: true
   when: use_systemd is defined