Removes feature flag from passing masterKey to SDK (#843)

* Remove Feature flag from master key usage

* Adds flag to fallback

* format

src/Common/CosmosClient.ts

@@ -83,7 +83,7 @@ export function client(): Cosmos.CosmosClient {
   if (_client) return _client;
   const options: Cosmos.CosmosClientOptions = {
     endpoint: endpoint() || "https://cosmos.azure.com", // CosmosClient gets upset if we pass a bad URL. This should never actually get called
-    ...(!userContext.features.enableAadDataPlane && { key: userContext.masterKey }),
+    key: userContext.masterKey,
     tokenProvider,
     connectionPolicy: {
       enableEndpointDiscovery: false,

src/hooks/useKnockoutExplorer.ts

@@ -106,7 +106,11 @@ async function configureHostedWithAAD(config: AAD, explorerParams: ExplorerParam
   try {
     keys = await listKeys(subscriptionId, resourceGroup, account.name);
   } catch (e) {
+    if (userContext.features.enableAadDataPlane) {
       console.warn(e);
+    } else {
+      throw new Error(`List keys failed: ${e.message}`);
+    }
   }
   updateUserContext({
     subscriptionId,