Puppet page throws an exception when saving -- fix it

ovirt.node.utils.fs.File() has changed arguments -- we don't set
the mode any longer, but the puppet_page was doing so. Change it
to the new interface.

Change-Id: Ia565cdd81560b1d1655d1ec75af595960751fbfa
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=986789
Signed-off-by: Ryan Barry <rbarry@redhat.com>