can not use -Djava.ext.dirs to redirect SunJCE provider with security manager

Test scenario
===============
Try to redirect ext dir using -Djava.ext.dirs flag.
let's say we try to redirect $JAVA_HOME/jre/lob/ext to $TESTHOME/ext
in order to access SunJCE provider, we have to copy sunjce_provider
from $JAVA_HOME/jre/lib/ext to $TESTHOME/newext
Then we can use -Djava.ext.dirs=$TESTHOME/newext to redirect ext dir
This supposed to work, but it don't.

How to reproduce
===============
1. cd /net/sqesvr/export/vsn/SECURITY/merlin_jdk/TestSuite/src/jce/Cipher/func/DESFunc
2. set your JAVA_HOME
3. sh Run.ext.sh
4. you will see this
java.security.NoSuchAlgorithmException: Algorithm DESede not available
        at javax.crypto.SunJCE_b.a(DashoA6275)
        at javax.crypto.Cipher.getInstance(DashoA6275)
        at TestCipherDESFunc.runTest(TestCipherDESFunc.java:86)
        at TestCipherDESFunc.run(TestCipherDESFunc.java:57)
        at TestCipherDESFunc.main(TestCipherDESFunc.java:35)

Note:
It failed with both Merlin JDK and Hopper JDK