Subject: [InfluxData Community] [Collect] Outputs.Cloudwatch write_statistics confusion

The plugin makes calls using PutMetricData, which has a limit of up to 20 different AWS metrics.  It does make one call per 20 metrics, but there is onne aspect where I believe the plugin could be improved.  If there are multiple values per metric it should be possible to write them together as the same metric in the request, up to 150 values, but instead each value is written separately.  It seems that this could be helpful if you are writing less frequently than the collection interval, and you have several intervals worth of data.