coordinator_read_size had wrong name in cassandra.yaml
coordinator_read_size had wrong name in cassandra.yaml

patch by Ekaterina Dimitrova, reviewed by David Capwell for CASSANDRA-17118
pauloricardomg/cassandra,instaclustr/cassandra,mshuler/cassandra,apache/cassandra,blambov/cassandra,jrwest/cassandra,apache/cassandra,adelapena/cassandra,belliottsmith/cassandra,jrwest/cassandra,pauloricardomg/cassandra,blambov/cassandra,instaclustr/cassandra,apache/cassandra,mike-tr-adamson/cassandra,thelastpickle/cassandra,blambov/cassandra,belliottsmith/cassandra,mike-tr-adamson/cassandra,instaclustr/cassandra,adelapena/cassandra,tjake/cassandra,adelapena/cassandra,thelastpickle/cassandra,mshuler/cassandra,tjake/cassandra,adelapena/cassandra,tjake/cassandra,belliottsmith/cassandra,mshuler/cassandra,apache/cassandra,pauloricardomg/cassandra,jrwest/cassandra,tjake/cassandra,jrwest/cassandra,thelastpickle/cassandra,pauloricardomg/cassandra,thelastpickle/cassandra,mike-tr-adamson/cassandra,belliottsmith/cassandra,mike-tr-adamson/cassandra,blambov/cassandra,instaclustr/cassandra,mshuler/cassandra