JAVA-680: Fixing a regression introduced in the previous commit for this issue. In the case where the driver is not connected to a replica set, like in mongos HA, still may need to ensure there is a master
JAVA-680: Fixing a regression introduced in the previous commit for this issue. In the case where the driver
is not connected to a replica set, like in mongos HA, still may need to ensure there is a master

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