The bus list of a disk on the VM create page came from the host's disk
device types: choosing "disk" for an added image offered cdrom, disk and
lun as its buses. The disk branch of get_disk_buses now returns the
host's disk bus types, the list the page starts each disk with.
131 test modules sat next to the code they test; instances alone had
51 of them beside views.py and utils.py. They move into a
tests/ package per app, and the JavaScript checks into
webvirtcloud/tests/js. Each non-empty tests.py becomes tests/test_views.py;
the empty generated stubs are removed.
Imports of the app's own modules become absolute, paths built from
__file__ go one level up, the live helper is instances.tests.livetest,
and coverage omits */tests/*. The suite discovers the same 960 tests as
before.
