Updating to rxjava 0.19.6
Updating to rxjava 0.19.6

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