Fix auto-generator bug (#1273)

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Fixes https://github.com/Azure/azure-sdk-for-cpp/issues/1263

sdk/storage/azure-storage-blobs/src/blob_rest_client.cpp

@@ -70,7 +70,7 @@ namespace Azure { namespace Storage { namespace Blobs { namespace Models {
 
   const PublicAccessType PublicAccessType::BlobContainer("container");
   const PublicAccessType PublicAccessType::Blob("blob");
-  const PublicAccessType PublicAccessType::Private("Private");
+  const PublicAccessType PublicAccessType::Private("");
 
   const RehydratePriority RehydratePriority::High("High");
   const RehydratePriority RehydratePriority::Standard("Standard");