[infinispan-dev] mvn improvements

Hi, Following some guidelines from "Mvn the definitive guide" I've factorized common libraries parent pom.xml(log4j and xstrem) - this will allow us to change the version identifier during upgrades in a single place, rather than in several. I also reduced dependency for each module: each module depends by default by easymock, easymockextension and testng. All other 'shared' artifacts were moved to dependecyManagent (from dependency). Some unused dependencies (mvn dependecy:analyze) were removed. Please let me know if you see any build issues. And a question: what is the purpose of having a parent pom.xml and <root>/pom.xml -> can't the <root>/pom.xml be the parent? Cheers, Mircea