Add CDI service activity monitoring

[marvec]

https://diplomky.redhat.com/topic/show/401/service-activity-monitoring-for-silverware

[marvec]

We could use a similar strategy as in https://github.com/panossot/jboss-automated-metrics

[marvec]

https://github.com/astefanutti/metrics-cdi

[marvec]

https://groups.google.com/forum/#%21topic/microprofile/rccA-oAbxcU