event-test.py: Sync list of storage lifecycle events
event-test.py: Sync list of storage lifecycle events

https://bugzilla.redhat.com/show_bug.cgi?id=1578337

Since libvirt 3.8.0 we have 6 events: defined, undefined,
started, stopped, created, deleted. However, the last two were
missing in a string list that translates libvirt events (int)
into human readable strings.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>

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