[go-migration] add cf-metrics-exporter framework

[stokpop]

fixes #1138

[rkoster]

How are these changes related to the introduction of the cf_metrics_exporter?

[stokpop]

Right, I will remove this change from this PR.

Can be put in another PR if appropriate:

Background: implementing the Detect() method for cf-metrics-exporter I found that JMX returns a different kind of name than all other frameworks listed in the detected frameworks:

Detected frameworks: [Java CF Env Client Certificate Mapper Container Security Provider CF Metrics Exporter jmx=5000 Java Opts]

Changed "jmx=5000" to "JMX" as Detect returned framework name.

[ramonskie]

im wondering if we need to add a integration test for this.
as we have integration tests for each of our frameworks.
something as simple does it install.

[stokpop]

im wondering if we need to add a integration test for this. as we have integration tests for each of our frameworks. something as simple does it install.

@ramonskie I will have a look if I can add an integration test for this