ParseContainerProperties task normalizes the registry part of the repository

I'm specifying my container repository as:

```xml
myregistry.com:123/$(AssemblyName)
```

But the `ParseContainerProperties` task "normalizes" it to "myregistry-com-123/...."

the only way for it to work, is to use this:

```xml
myregistry.com:123/$(AssemblyName.Replace('.','-').ToLowerInvariant())
```

Is that intended?

What is the `ContainerRegistry` parameter used for?