Changed test of addUser so that it actually work when mongod is started with --auth
Changed test of addUser so that it actually work when mongod is started with --auth

gianpaj/mongo-java-driver,wanggc/mongo-java-driver,jsonking/mongo-java-driver,wanggc/mongo-java-driver,jyemin/mongo-java-driver,jyemin/mongo-java-driver,kay-kim/mongo-java-driver,rozza/mongo-java-driver,rozza/mongo-java-driver,PSCGroup/mongo-java-driver,jsonking/mongo-java-driver