8191924: Adjust DelegatingClassLoader's metadata space sizing algorithm Summary: Reduce memory usage for delegating class loader's metadata by adjusting sizing alogrithm Reviewed-by: adinn, stuefe, coleenp

^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*