examples: remove use of deprecated setDaemon method
examples: remove use of deprecated setDaemon method

In Python 3.10 the setDaemon method was deprecated. It is redundant
since the 'daemon' parameter can be given when creating the thread,
or the 'daemon' attribute can be set after it was created.

Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

libvirt/libvirt-python,libvirt/libvirt-python,libvirt/libvirt-python