Provide installation of javaagent

[jmonterrubio]

Prerequisites

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  • Checked that your issue isn't already filled: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aidealista
  • Checked that there is not already provided the described functionality

Description

It would be nice to provide the jmx exporter as javaagent instead of as a service. Maybe give the choice between one of them or both