Revert "added Invoker and Promise ActorSystems to the plugin"

This reverts commit 3329f29c736416e130f01ff696bf74d0b9f160b7.
Revert "Include name of actor system in component/metric name"

This reverts commit 5d8bc04e9fba58dead3898cc90ac9ce5ef0363fd.
Revert "No longer truncate name of EC. - There are duplicate names otherwise (even in one ActorSystem)"

This reverts commit 91d3f15f3cad0eaa22299613c9d925dfbe63d41b.
Revert "Use listing of ECs from ActorSystem rather than play config. - Config doesnt alway have all"

This reverts commit 2b9c109a218a09eed0085da7759182a66ba2330c.