8201537: Remove is_alive closure from Klass::is_loader_alive() Summary: remove is_alive closure from callers of Klass::is_loader_alive so that cleaning metadata doesn't require GC closure. Reviewed-by: adinn, stefank

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