8227922: DocTreeScanner does not dive into AttributeTree.getValue() and LiteralTree.getBody() Summary: DocTreeScanner.visitAttribute and visitLiteral have to scan through the subnodes of AttributeTree and LiteralTree, respectivelly. Reviewed-by: vromero

^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
(^|/)\.DS_Store
(^|/)\.metadata/
(^|/)\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
(^|/)JTreport/
(^|/)JTwork/
(^|/)\.git/
^src/utils/hsdis/build/