ICU4J 4.4 fails to load available locales on WebSphere

ICU4J 4.4 fails to load available locales from resources on WebSphere. In ICU4J 4.4, we decided to remove res_index.txt. Without res_index.txt, the ICU implementation relies on ClassLoader#getResources to get a list URLs in the locale data path, then iterate through the list to create available locale list. However, ICU only handles "file" and "jar" protocols. On WebSphere, "wsjar" protocol is used and ICU fails to create the list.

When available locale list is empty, ICU services throw MissingResourceException. Thus, locale services fail to instantiate service objects. For example, Calendar.getInstance(), NumberFormat.getInstance() and many others fail on WebSphere for this reason.