[ninefold|storage] allow overwriting files for consistency

lib/fog/ninefold/models/storage/file.rb

@@ -73,13 +73,15 @@ module Fog
           options[:headers] ||= {}
           options[:headers]['Content-Type'] = content_type if content_type
           options[:body] = body
-          if objectid
-            # pre-existing file, do a PUT
-            data = connection.put_namespace(ns, options)
-          else
-            # new file, POST
+          begin
             data = connection.post_namespace(ns, options)
             self.objectid = data.headers['location'].split('/')[-1]
+          rescue => error
+            if error.message =~ /The resource you are trying to create already exists./
+              data = connection.put_namespace(ns, options)
+            else
+              raise error
+            end
           end
           # merge_attributes(data.headers)
           true