It the 'chrony_enabled' key isn't found by hiera, the validation
will now proceed as if it was disabled. This should allow for successful
run on clouds with mix of ntp implementations.
Resolves: rhbz#2156049
Signed-off-by: Jiri Podivin <jpodivin@redhat.com>
Change-Id: Ic9860b3531639e85926f5221cd9c5cde03eecfa8