public static CompletableFuture<AsyncConnection> createAsyncConnection() {
    return createAsyncConnection(HBaseConfiguration.create());
  }
Call {@link #createAsyncConnection(Configuration)} using default HBaseConfiguration.
@see #createAsyncConnection(Configuration)
@return AsyncConnection object wrapped by CompletableFuture
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionFactory.java