8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8050430: Provided new utility visitors supporting SourceVersion.RELEASE_9
Reviewed-by: jjg

8031569: Refactor javac scope implementation to enable lazy imports
Summary: Introducing an internal API for Scope; rewriting ImportScopes to extend CompoundScopes.
Reviewed-by: mcimadamore, jjg, jfranck
Contributed-by: maurizio.cimadamore@oracle.com, jan.lahoda@oracle.com

7025809: Provided new utility visitors supporting SourceVersion.RELEASE_8
Reviewed-by: jjg, mcimadamore

6962318: Update copyright year
Reviewed-by: xdono

6933147: Provided new utility visitors supporting SourceVersion.RELEASE_7
Reviewed-by: jjg

6943119: Rebrand source copyright notices
Reviewed-by: darcy

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