Preserve comparer of the original dictionary from ConfigurationProvid…

…er (dapr#935)

Signed-off-by: Tomas Hrebicek <tomhreb@users.noreply.github.com>
Co-authored-by: Whit Waldo <whit.waldo@innovian.net>
Signed-off-by: Divya Perumal <divzi.perumal@gmail.com>

src/Dapr.Extensions.Configuration/DaprConfigurationStoreProvider.cs

@@ -89,7 +89,7 @@ private async Task LoadAsync()
                             var subscribeConfigurationResponse = await daprClient.SubscribeConfiguration(store, keys, metadata, cts.Token);
                             await foreach (var items in subscribeConfigurationResponse.Source.WithCancellation(cts.Token))
                             {
-                                var data = new Dictionary<string, string>(Data);
+                                var data = new Dictionary<string, string>(Data, StringComparer.OrdinalIgnoreCase);
                                 foreach (var item in items)
                                 {
                                     id = subscribeConfigurationResponse.Id;