IEnumerable`1 for ContentType PropertyType

[FrancisGroleau]

If we have a ContentType like so:

public class MyContentType
{
    public IEnumable<MyPropertyType> MyPropertyTypeList {get; set;}
}

and we use the graph source client:

    _graphSourceClient.ConfigureContentType<MyContentType>()
                .Field(f => f.MyPropertyTypeList , IndexingType.PropertyType)

when the client is generating the type definition through
SourceConfigurationModel method AddContentTypeField

It will add to the fieldConfiguration for the MappedType IEnumerable`1
Instead of [MyPropertyType]