To keep some semblance of sanity in our results when the flood gates are opened, we want to support namespaces in ResultsDB.

The basic idea is:
* treat testcase names as more of a simple data structure instead of a small string
* qa.depcheck would be the depcheck check from the qa namespace (where we'd put all of our tasks)
* pkgs.<pkgname> would be the root of where pacakge-specific checks would go
* There would best practice suggestions for naming of testcases but no enforcement of those "rules"
* Most top-level namespaces would be "restricted" to certain tasks/owners
* "enforcement" would be at the libtaskotron level, implemented as a whitelist of git repo sources

This is the higher-level tracking ticket for the feature.