changed EH connection constant names for updated sample

Author: JimacoMS3

articles/iot-hub/quickstart-send-telemetry-java.md

@@ -137,9 +137,9 @@ The back-end application connects to the service-side **Events** endpoint on you
 
     | Variable | Value |
     | -------- | ----------- |
-    | `eventHubsCompatibleEndpoint` | Replace the value of the variable with the Event Hubs-compatible endpoint you made a note of earlier. |
-    | `eventHubsCompatiblePath`     | Replace the value of the variable with the Event Hubs-compatible path you made a note of earlier. |
-    | `iotHubSasKey`                | Replace the value of the variable with the service primary key you made a note of earlier. |
+    | `EVENT_HUBS_COMPATIBLE_ENDPOINT` | Replace the value of the variable with the Event Hubs-compatible endpoint you made a note of earlier. |
+    | `EVENT_HUBS_COMPATIBLE_PATH`     | Replace the value of the variable with the Event Hubs-compatible path you made a note of earlier. |
+    | `IOT_HUB_SAS_KEY`                | Replace the value of the variable with the service primary key you made a note of earlier. |
 
 3. In the local terminal window, run the following commands to install the required libraries and build the back-end application: