httptest.NewTLSServer is ~0.2s of setup per test

We're not exercising anything TLS related in client and request,
set these back to NewServer.  Should add a new TLS end-to-end
test for hack/test-cmd.sh with real (test) certs.
Merge pull request #788 from smarterclayton/use_regular_http_in_tests

httptest.NewTLSServer is ~0.2s of setup per test