HHVM-171: Manager::selectServer() should select exception class based on bson_error_t
HHVM-171: Manager::selectServer() should select exception class based on bson_error_t

mongodb/mongo-hhvm-driver,jmikola/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-prototype,10gen-labs/mongo-hhvm-driver-prototype,10gen-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,jmikola/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver,jmikola/mongo-hhvm-driver,mongodb/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,mongodb/mongo-hhvm-driver,mongodb/mongo-hhvm-driver