Calls to PyMISP.update with wrong event argument

[gcrahay]

I think 619538c introduced a bug in:

• PyMISP.publish
• PyMISP.change_threat_level
• PyMISP.change_sharing_group
• PyMISP._send_attributes

Example:

def change_threat_level(self, event, threat_level_id):
        e = self._make_mispevent(event)
        e.threat_level_id = threat_level_id
        return self.update(event)

self.update should be called with e as argument, not event.

[Rafiot]

Thanks for the report, fixing!