Doc fixes in the async MongoDatabase javadoc

Author: rozza

driver-async/src/main/com/mongodb/async/client/MongoDatabase.java

@@ -65,7 +65,7 @@ public interface MongoDatabase {
     WriteConcern getWriteConcern();
 
     /**
-     * Get the read concern for the MongoCollection.
+     * Get the read concern for the MongoDatabase.
      *
      * @return the {@link com.mongodb.ReadConcern}
      * @since 3.2
@@ -76,31 +76,31 @@ public interface MongoDatabase {
     /**
      * Create a new MongoDatabase instance with a different codec registry.
      *
-     * @param codecRegistry the new {@link org.bson.codecs.configuration.CodecRegistry} for the collection
+     * @param codecRegistry the new {@link org.bson.codecs.configuration.CodecRegistry} for the database
      * @return a new MongoDatabase instance with the different codec registry
      */
     MongoDatabase withCodecRegistry(CodecRegistry codecRegistry);
 
     /**
      * Create a new MongoDatabase instance with a different read preference.
      *
-     * @param readPreference the new {@link com.mongodb.ReadPreference} for the collection
+     * @param readPreference the new {@link com.mongodb.ReadPreference} for the database
      * @return a new MongoDatabase instance with the different readPreference
      */
     MongoDatabase withReadPreference(ReadPreference readPreference);
 
     /**
      * Create a new MongoDatabase instance with a different write concern.
      *
-     * @param writeConcern the new {@link com.mongodb.WriteConcern} for the collection
+     * @param writeConcern the new {@link com.mongodb.WriteConcern} for the database
      * @return a new MongoDatabase instance with the different writeConcern
      */
     MongoDatabase withWriteConcern(WriteConcern writeConcern);
 
     /**
      * Create a new MongoDatabase instance with a different read concern.
      *
-     * @param readConcern the new {@link ReadConcern} for the collection
+     * @param readConcern the new {@link ReadConcern} for the database
      * @return a new MongoDatabase instance with the different ReadConcern
      * @since 3.2
      * @mongodb.server.release 3.2