event-test: add missing events
event-test: add missing events

Update the example to be able to trace all events.

* examples/event-test.py (main): Match full list of domain events.
(myDomainEventIOErrorReasonCallback)
(myDomainEventControlErrorCallback)
(myDomainEventBlockJobCallback, myDomainEventBlockJob2Callback)
(blockJobTypeToString, blockJobStatusToString): New functions.

Signed-off-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

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