Added extra create helpers to MongoClients

Author: rozza

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

@@ -35,6 +35,16 @@
  * @since 3.0
  */
 public final class MongoClients {
+
+    /**
+     * Creates a new client with the default connection string "mongodb://localhost".
+     *
+     * @return the client
+     */
+    public static MongoClient create() {
+        return create(new ConnectionString("mongodb://localhost"));
+    }
+
     /**
      * Create a new client with the given client settings.
      *
@@ -45,6 +55,16 @@ public static MongoClient create(final MongoClientSettings settings) {
         return new MongoClientImpl(settings, createCluster(settings, getStreamFactory(settings)));
     }
 
+    /**
+     * Create a new client with the given connection string.
+     *
+     * @param connectionString the connection
+     * @return the client
+     */
+    public static MongoClient create(final String connectionString) {
+        return create(new ConnectionString(connectionString));
+    }
+
     /**
      * Create a new client with the given connection string.
      *