correct format for memory module in dockerbeat

[stickperson]

As discussed here, docker.memory.usage.pct in dockerbeat was off by a factor of 100. As per @andrewkroh, I updated the fields.

[elasticmachine]

Can one of the admins verify this patch?

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically on build-eu-00. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[exekias]

thanks @stickperson! You need to run make update after changing fields.yml, so documentation and internal files get updated. Build is failing because of that, give it a try and push new changes :)

[andrewkroh]

Thanks for fixing the issue. Could you please add a line to the CHANGELOG.asciidoc under the bugfix section for Metricbeat.

[andrewkroh]

jenkins, test it