xDSCWebService: Deprecate IIS ApplicationPool and WebSite support

[tmeckel]

Details of the scenario you tried and the problem that is occurring

The resource xDSCWebService, which is used to setup a DSC PullServer, handles the creation of the required IIS Application Pool and WebSite object of it's own, although there exists the DSC xWebAdministration module, which handles exactly this purpose.

To ease the maintenance of the xDSCWebService resource the support for handling the application pool and website should be phased out of this resource using a obsolescence process like which has been started with the firewall rule support.

Verbose logs showing the problem

N/A

Suggested solution to the issue

Remove support for handling the IIS Application Pool and Website.

The DSC configuration that is used to reproduce the issue (as detailed as possible)

N/A

The operating system the target node is running

N/A

Version and build of PowerShell the target node is running

N/A

Version of the DSC module that was used ('dev' if using current dev branch)

master/dev