lxd/db/instances/test: Renames TestInstanceListExpanded to TestInstanceList
lxd/db/instances/test: Renames TestInstanceListExpanded to TestInstanceList

And updates usage. The new function doesn't expand config always now, so have updated the test to expand config using the helpers so this functionality is still tested.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

hallyn/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,atxwebs/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,atxwebs/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,atxwebs/lxd