IOTHUB_CONNECTION_STRING='<HostName=...>'
IOTHUB_EVENTHUB_CONNECTION_STRING='<Endpoint=...>'
IOTHUB_EVENTHUB_CONSUMER_GROUP='$Default'
IOTHUB_PARTITION_COUNT=4
IOTHUB_E2E_X509_CERT_BASE64=''
IOTHUB_E2E_X509_PRIVATE_KEY_BASE64=''
IOTHUB_E2E_X509_THUMBPRINT=''