GERONIMO-6389 Obscuring Passwords Feature couldn't work (Patch from XieZhi)
Register {Configured} prefix to EncryptionManager while starting the server.

git-svn-id: https://svn.apache.org/repos/asf/geronimo/server/branches/3.0@1459106 13f79535-47bb-0310-9956-ffa450edef68