Summary of the new feature/enhancement

As a user I want to get the security descriptor of a service so that I can verify and modify it if required. This can be achieved by introducing a new SecurityDescriptor property in the Service object.

The output should look like

PS >Get-Service BITS | Select-Object -Property SecurityDescriptor

SecurityDescriptor
------------------
D:(A;CI;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)