Share Worker Metric Registry For Guice AOP Based Metrics Integeration

Metric Registry has been made private which makes it harder to integrate with Guice based AOP metrics.

Proposed solve is to add metric registry created in the worker to SharedMetricRegistries so while intializing guice based AOP metrics it can be done in worker hook
https://github.com/palominolabs/metrics-guice

PR:
https://github.com/apache/storm/pull/3373