Removing use of Collections.newSetFromMap, which isn't in Java 5.
Removing use of Collections.newSetFromMap, which isn't in Java 5.

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