Merge pull request #28 from mariusgrigaitis/patch-1

Get rid of deprecation warning from aws sdk

Author: atomita

lib/fluent/plugin/out_aws-elasticsearch-service.rb

@@ -92,7 +92,7 @@ def credentials(opts)
       end
       def calback.inspect
         credentials = self.call
-        "#<#{credentials.class.name} access_key_id=#{credentials.access_key_id.inspect}>"
+        credentials.credentials.inspect
       end
       calback
     end