Provide an XML Configuration to configure the value of MaxInstantRetry

[dhaval24]

Currently the InProcessTelemetryChannel has the capacity to programatically set the value of MaxInstantRetries between [1.,10]. However, this value should be configurable via XML Configuration.

Possible solution :
Add XML attribute MaxInstantRetry in the ChannelXMLElement class for configuration to pick this up.

[littleaj]

Agreed.