Use AWS SDK default log formatter if it isn't configured

Author: andrykonchin

lib/dynamoid/adapter_plugin/aws_sdk_v3.rb

@@ -114,8 +114,9 @@ def connection_config
 
         # https://github.com/aws/aws-sdk-ruby/blob/master/gems/aws-sdk-core/lib/aws-sdk-core/plugins/logging.rb
         # https://github.com/aws/aws-sdk-ruby/blob/master/gems/aws-sdk-core/lib/aws-sdk-core/log/formatter.rb
-        default_formatter = Aws::Log::Formatter.new(':operation | Request :http_request_body | Response :http_response_body')
-        @connection_hash[:log_formatter] = Dynamoid::Config.log_formatter || default_formatter
+        if Dynamoid::Config.log_formatter
+          @connection_hash[:log_formatter] = Dynamoid::Config.log_formatter
+        end
 
         @connection_hash
       end