Event Hub sender test
Send events to specified event hub
Event hub connection string is teaken from "EHProducer" environmental variable like "Endpoint=sb://.servicebus.windows.net/;SharedAccessKeyName=SendAndListenPolicy;SharedAccessKey=;EntityPath=***",
Other env variables:
"BatchSize" - Batch size is number of events in batch. Default 1. "NoEvents" - Number of produces events. Default 1. "MaxNoPart" - Number of partition of consumer EH, Default is 0. If specified partition in batch will be set to random number between 0 - specified nummber