8191360: Lookup of critical JNI method causes duplicate library loading with leaking handler Summary: Unload shared library after lookup to avoid keeping it live. Reviewed-by: vlivanov, dholmes

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