suppressing kapt processor still suggests to remove kapt plugin

[tasomaniac]

If the kapt processor has a suppress annotation, that is ignored from the report. But if that's the only one in the module, then ModuleCheck still suggests removing the plugin. In this case, 2 annotations are needed to fully suppress.

Instead, it should be successful when the only unused kapt process is suppressed.

[RBusarow]

This is fixed in 0.12.1. I tagged the PR (#604) with the wrong issue, so this issue wasn't auto-closed upon merge.