.net fx compat

Author: pablomartinezbernardo

tracer/test/test-applications/integrations/Samples.CosmosDb/Samples.CosmosDb.csproj

@@ -24,6 +24,7 @@
          Please add a reference to Newtonsoft.Json or set the 'AzureCosmosDisableNewtonsoftJsonCheck'
           property to 'true' to bypass this check-->
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>
 
 </Project>