Add support for 'partial configuration'

[dragon788]

This is a new feature of PS5 that allows for creating multiple separate configurations that may depend on each other and ensures that they get applied in the correct order. This feature can used for both push and pull configs (but possibly not from SMB pull servers yet?) and requires each config to be called with Publish-DSCConfiguration or Update-DSCConfiguration (depending on Pull or Push or Mixed settings) and the final call should be Start-DSCConfiguration -UseExisting. This would be really slick to test locally before having to set up an entire pull server just to test a small piece of a new config.

[mefellows]

Thanks @dragon788, I've been out of the DSC game for a little bit. Can you point me to some good material on the subject?

[dragon788]

@mefellows Here's the "official" docs, https://msdn.microsoft.com/en-us/powershell/dsc/partialconfigs