Fixing storage client issue for Azure

--HG--
branch : 1.x

src/Orchard.Azure/AzureFileSystem.cs

@@ -345,21 +345,27 @@ namespace Orchard.Azure {
             }
 
             public string GetPath() {
+                using (new HttpContextWeaver()) {
                     return _blob.Uri.ToString().Substring(_rootPath.Length).Trim('/');
                 }
+            }
 
             public long GetSize() {
+                using (new HttpContextWeaver()) {
                     return GetDirectorySize(_blob);
                 }
+            }
 
             public DateTime GetLastUpdated() {
                 return DateTime.MinValue;
             }
 
             public IStorageFolder GetParent() {
-                if ( _blob.Parent != null ) {
+                using (new HttpContextWeaver()) {
+                    if (_blob.Parent != null) {
                         return new AzureBlobFolderStorage(_blob.Parent, _rootPath);
                     }
+                }
                 throw new ArgumentException("Directory " + _blob.Uri + " does not have a parent directory");
             }