8145342: Some copyright notices are inconsistently and ill formatted
Summary: Adjusted formatting of copyright notices.
Reviewed-by: darcy, alundblad

6983738: Use a JavacTestingAbstractProcessor
Reviewed-by: jjg

6943119: Rebrand source copyright notices
Reviewed-by: darcy

6926699: Annotation processing regression tests should typically return SourceVersion.latest
Reviewed-by: jjg

6843648: tools/javac/versions/check.sh is broken
Reviewed-by: darcy

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