We now have a config.Config struct which contains all the data in the
configuration file. Unfortunately, we still need a global config since
the routes do not have access to state. The globalConfig variable and
config.Get{Field} methods will be removed in a future path, which will
clean up a lot of testing infrastructure to not require writing changes
to disk.
The cleanup involved updating all the tests in routes_tests.go, so I
removed the setup/tearddown methods, which are not very idiomatic for go
unit tests and since you cannot defer into a parent scope it make sense
to have the following pattern:
state := helpers.SetUp(t, ...)
defer helpers.TearDown(t, state)
for all the resources in a unit test.
