configuration for unknown kapt behavior

[RBusarow]

Additional kapt matchers can be defined using additionalKaptMatchers in the extension, but what about processors which aren't defined? If a processor is present in the project but not defined in ModuleCheck, it will currently default to "unused" and fail the task.

Valid options seem to be:

• Strict mode
  • fail the task with a reason such as "undefined kapt processor"
  • this would require the developer to add the processor to additionalKaptMatchers in order to continue.
• Warning mode
  • log a warning that there's an undefined processor and suggest adding it
• Silent mode
  • Don't do anything.
  • This seems somewhat valid if the developer only cares about the big named processors, perhaps maybe only Dagger. Silent mode is a quick and dirty way of getting what they need without the hassle of adding anything else.