CollationElementIterator next()/Previous() operation does not get reverse element list from each other for unmapped character or surrogate pair. It is not a regression bug.

Please see test 2 scenarios #2 and #3 inside of CollationElementIteratorTest.java at /net/sqenfs-1.sfbay/export1/comp/i18n/workspaces/jdk7/i18n/src/GS-Tonga/CollatorTestExtension/CollationElementIteratorTest or see the attachements

Step to reproduce:
Run the attached the test case.

Tested jdk: build 1.7.0-ea-b23
Tested system: solaris