Create acceptance tests for 4.5.10.1 requests

[smspillaz]

These automated acceptance tests must start a database and web server and check that the expected response comes from the server.

• [x] Create database and server instance that runs just during the tests
• [x] Add function to seed database with mock data

Create the following tests:

• [x] 4.5.10.1 Requests - Endpoint Request for Chart
• [x] 4.5.10.2 Requests - Endpoint Request for Chart that does not exist
• [x] 4.5.10.3 Requests - Endpoint Request for Chart - Query Failure
• [ ] 4.5.10.4 Requests - Endpoint Request to Commence Scraping
• [ ] 4.5.10.5 Requests - Endpoint Request for Commence Scraping - Failure to connect to Scraping Service
• [ ] 4.5.10.6 Requests - Endpoint Request for Commence Scraping - Scraping Failure part-way through Scrape
• [ ] 4.5.10.7 Requests - Endpoint Request for Commence Scraping - Attempt to commence scraping whilst already commenced.
• [ ] 4.5.10.8 Requests - Endpoint Request for Commence Scraping - Cancellation of Scrape in progress
• [ ] 4.5.10.9 Requests - Endpoint Request for Commence Scraping - Cancellation of Scrape where scrape not in progress
• [x] 4.5.10.10 Requests - Invalid Page or API Endpoint URL

Estimated time: 2 hours Actual time: 6 hours

The reason this has been so difficult mostly revolved around getting node's child_process module to co-operate with the python seed script. I imagine there may be some more work required to get this running on travis-ci.

[smspillaz]

The endpoint requests to commence scraping are blocked on #47