8192003: Refactor weak references in StringTable to use the Access API
Reviewed-by: pliden, dholmes, coleenp
^build/
^dist/
^.idea/
nbproject/private/
^webrev
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^.jib/
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test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*