Add SCCM Agent to gold IMAGE

Adding sccm clients to our gold image to avoid installing sccm client every time we build  a new vm.

To install sccm client is straight forward but we need to do some post clean up before we do sysprep/capture our image.

Once you install the SCCM client on your vm (image vm), please do the following action before performing sysprep/capture:

1. Install the SCCM client on the target vm 
2.  Stop the SCCM client service (ccmexec)
3.  Remove the SMS certificates stored in the local computer certificate store.
4.  Delete the %SystemRoot%\SmsCfg.ini file   (c:\windows\smscfg.ini)