Update must be called twice before blueprints call returns data

[samludford]

After blueprints json files have been generated in temp folder (by calling api/update), api/blueprints still returns an empty array until api/update has been called a second time.

Steps to reproduce:

1. delete json files in temp folder.
2. hit api/update - notice json files have been generated in temp folder
3. hit api/blueprints - notice list is empty
4. hit api/update again.
5. hit api/blueprints - notice blueprints data returned as expected