Refactor to test study

Create a test study with splash screens
Point all our tests at the test study (except the PhantomJS tests which require PD study)
Change all the host names so that test is the default thing you see
Add header and parameter to swap the selected host, for testing
scan for healthDataCode in the healthId<->healthDataCode mapping, combine with study and search the consents table for that key, if it exists, that health code is in the survey and needs a schedule generated.