PoC of alert correlation to identify responsible application

[dwding18]

Following scenario:

1. Leverage application dependency data (assuming w/ a plug-able interface so it could deal with different external source like opentracing etc)
2. Correlation alerts in the dependency call graph for upstream/downstream applications. Correlation could be done with time window, etc.
3. From a upstream application alert, trace down to find list of possible responsible root causes (alert), and score them with confidence level.
4. Serve as an API.

[dwding18]

@davemasselink investigate UI options for showing alert correlations.

[dwding18]

Move back to backlog.