Add NTPd resource to core

Core Chef Resource Checklist

Before suggesting a resource for inclusion please make sure your suggestion meets these criteria for resources built into Chef:

• Automates an operating system component that ships by default on systems such as authentication, raid, disk partitions, firewalls, containers, or virtualization systems.
• Does not attempt automate 3rd party applications such as database, web, or application servers, which are best suited for cookbooks due to their fast moving nature.

Describe the resource:

This woudl be a resource for setting up NTPd on a host. It would handle the config via properties passed by the user and it would start/enable the service. It wouldn't manage chronyd or any other NTP type services. Just NTP

Why should this be included out of the box?:

This is a super common thing that people want to do and it should just work out of the box.

What operating systems would it run on?

Linux and potentially Solaris/AIX.

Current cookbook implementation:

ntp

Start by reviewing the current ntp cookbook implementation and Chef's existing core resource patterns. Define the resource's configuration properties and start/enable behavior for NTPd, with Linux as the stated target and Solaris/AIX as possible extensions; done means the requested core resource works within that scope.