fix MockFileStoreApi to record uploaded files

services/web/test/acceptance/coffee/helpers/MockFileStoreApi.coffee

@@ -8,8 +8,11 @@ module.exports = MockFileStoreApi =
 		app.post "/project/:project_id/file/:file_id", (req, res, next) =>
 			req.on 'data', ->
 
-			req.on 'end', ->
-				res.send 200
+			req.on 'end', =>
+				{project_id, file_id} = req.params
+				@files[project_id] ?= {}
+				@files[project_id][file_id] = { content : "test-file-content" }
+				res.sendStatus 200
 
 		app.listen 3009, (error) ->
 			throw error if error?