New and Changed Context Service Objects

Do more with these new and changed Context Service objects.

Use context definitions with Data Processing Engine definitions
Use the new ContextDefinitionTfrm object and the new IsTranformationEnabled field on the ContextDefinition object.
Disable localization for a context attribute
Use the new IsLocalizationDisabled field on the ContextAttribute object.
Track generated Apex classes for context definition versions
Use the new InheritedApexVersion and ExternalServiceRegistration fields on the ContextDefinitionVersion object.