Some IdentityReferences cannot be translated to
[System.Security.Principal.SecurityIdentifier] because they don't map to
a SecurityIdentifier.
An example is:
IdentityReference : APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES
In such case, it is better to catch the exception and treat it as $false.
The default error action is to stop. When generating the initial
VM configuration during import, if the Compare-VM command fails
it results in a generic error message. Instead the error should
be ignored so the source VM can be inspected and a useful error
message can be returned to the user.
