Creating rootcert with same name

[TedEkstrom]

There is a minor problem that is not caught and that is if you create a root cert with the same name. It will give an error message that is difficult to decipher. I could not create a cert with the same name even if I had removed it. There should be a check for this.

.\New-PSDServerCert.ps1 -DNSName psddev.network.local -FriendlyName psddev.network.local -ValidityPeriod 10 -RootCACertFriendlyName PSDRootCA