Refactor group fingerpint tests
Refactor group fingerpint tests

Depending on exact value breaks when testing with a different Go version since implementation details might cause structhash to return a different hash. We don't depend on exact values in the UI, we only require that those values are unique to a unique set of labels and selected attributes, so that's what we should test rather than hardcoded values. This PR allows unsee to pass tests under Go 1.9beta2

cloudflare/unsee,cloudflare/unsee,cloudflare/unsee,cloudflare/unsee,cloudflare/unsee