BabuDB/Java/Replication:

proxy range lookups do now provide properly ordered results;
TransactionManagerProxy will no delay requests if locked instead of throwing an exception;
changed logLevel for transaction failures at the proxy server to debug;

git-svn-id: https://babudb.googlecode.com/svn/trunk@497 d4c7dd96-b7b2-11dd-893d-d98698f66bbf