When generating .NET code, convert non-default namespace parts to PascalCase. #174
Description
Currently, if a JSII type's namespace is a child of the default namespace, the child namespace is not PascalCased. For example, jsii-calc.composition.CompositeOperation has the namespace Amazon.JSII.Tests.CalculatorNamespace.composition, when it should be Amazon.JSII.Tests.CalculatorNamespace.Composition.