8056061: Mark implementations of public interfaces with an annotation
Summary: Adding @DefinedBy annotation to mark methods that implement public API methods; annotating the methods; adding a coding rules analyzer to enforce all such methods are annotated.
Reviewed-by: jjg, mcimadamore, jfranck
Contributed-by: jan.lahoda@oracle.com, jonathan.gibbons@oracle.com

8043643: Add an crules analyzer avoiding string concatenation in messages of Assert checks.
Summary: Generalizing the crules infrastructure, adding a new analyzer to check String concatenation in Assert calls.
Reviewed-by: jjg, vromero

8010304: javac should detect all mutable implicit static fields in langtools using a plugin
Reviewed-by: jjg