Capture and Log Proxy Response Time in Agent Debugger

[Zakaria-Kofiro]

Capture and Log Istio Response Time in Agent Debugger

• Capture istio response/service time from services via x-envoy-upstream-service-time header, log in both Debugger tool and CSV export file
• Escape special characters (i.e commas) in Request URL when exporting CSV response data from Agent Debugger tool
• Set Apache HttpClient 4.5 as default client in Agent Debugger tool

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[kevin-mcgoldrick]

Please rename ISTIO to PROXY, so that this can be generalized in the future to support more than just istio (envoy, nginx, apache).

[kevin-mcgoldrick]

LGTM