Add Invocation Id to Set-FunctionInvocationContext and propagate trace information in HTTP requests to correlate client and orchestration functions#1111

bachuv merged 4 commits intodevAzure/azure-functions-powershell-worker:devfrom

andystaples/distributed-tracing-pocAzure/azure-functions-powershell-worker:andystaples/distributed-tracing-pocCopy head branch name to clipboard