virt-aa-helper: allow spaces in vm names

virt-aa-helper: allow spaces in vm names

libvirt allows spaces in vm names, there were issues in the past but it
seems not removed so the assumption has to be that spaces are continuing
to be allowed.

Therefore virt-aa-helper should not reject spaces in vm names anymore if
it is going to be refused causing issues then the parser or xml schema
should do so.
Apparmor rules are in quotes, so a space in a path based on the name works.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>