f70ec0de69
This splits a few NixOS tests (namely Chromium, VirtualBox and the networking tests) into several subtests that are exposed via attributes. The networking tests were already split up but they didn't expose an attribute set of available tests but used a function attribute to specify the resulting test instead. A new function callSubTests in nixos/release.nix is now responsible for gathering subtests, which is also used for the installer and boot tests. The latter is now placed in a tests.boot.* namespace rather than "polluting" the tests attribute set with its subtest.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.