Get rid of the installer registration concept

This is a legacy of the days where the kvm kernel modules would
be installed either by compiling the source code or via "kmod"
like packages, and the loading and unloading of kernel modules
would depend on that.

Nowadays, we can assume that the kvm modules always come from
the kernel packages.

One last piece of refiniment here would be to remove the module
loading/unloading feature from the base installer code.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
libvirt.tests.virsh_cmd: Fix invalid syntax

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
virttest.virsh: Fix void return of domiftune

That function was supposed to return a CmdResult object,
but it wasn't due to a rebase mistake.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
libvirt.virsh_cmd: virsh_desc PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
libvirt.virsh_cmd: virsh_numatune PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
libvirt.virsh_cmd: virsh_node_memtune PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
libvirt.virsh_cmd: virsh_snapshot_disk PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
run: PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
shutdown: PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
v2v: convert_remote_vm PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
virttest.qemu_monitor: PEP8 fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>