Restoring stress project reference (Azure#36865)

* Restoring stress project reference

* Update sdk/eventhub/Azure.Messaging.EventHubs/stress/src/Azure.Messaging.EventHubs.Stress.csproj

Co-authored-by: JoshLove-msft <[email protected]>

---------

Co-authored-by: JoshLove-msft <[email protected]>

Author: jsquire

sdk/eventhub/Azure.Messaging.EventHubs/stress/src/Azure.Messaging.EventHubs.Stress.csproj

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <!--ProjectReference Include="..\..\src\Azure.Messaging.EventHubs.csproj" /-->
+    <ProjectReference Include="..\..\src\Azure.Messaging.EventHubs.csproj" />
     <ProjectReference Include="..\..\..\Azure.Messaging.EventHubs.Processor\src\Azure.Messaging.EventHubs.Processor.csproj" />
   </ItemGroup>