BabuDB/Java/Replication:

fixed IntegrationTest and HeartbeatTest;
extracted configuration parameters from PBRPCTest to TestParameters;
added a new Test for the RequestHandler, esp. for the new queuing mechanism;

git-svn-id: https://babudb.googlecode.com/svn/trunk@439 d4c7dd96-b7b2-11dd-893d-d98698f66bbf