Handle case where ex-employee is assignee of bugzilla ticket

[gene1wood]

If an old resolved bugzilla ticket for a VA or RRA has some update to it (another bug is set as "See Also" for it, a comment etc) and that old bugzilla ticket is assigned to someone who no longer works here, the code attempts to do things in CASA which fails because the user's CASA id doesn't work (because they don't work here)

I don't think that there's any reason to be making changes to CASA tickets for already resolved bugzilla tickets if those changes don't affect anything in CASA.

Apr 14 18:18:36 ip-172-31-18-38 journal: [18:18:36] ERROR [__main__.autocasa:215] Attempt to set CASA ticket delegator failed : ('https://biztera.com/api/v1/projects/10449/channels/security',
 'Bad Request', 400, '{"approverIds": ["590359b87320670010970a37"]}', '{"code":400,"message":"New users are not all organization members.","documentationURL":"https://biztera.com/developer"}'
)
Apr 14 18:18:36 ip-172-31-18-38 python3: [18:18:36] ERROR [__main__.autocasa:215] Attempt to set CASA ticket delegator failed : ('https://biztera.com/api/v1/projects/10449/channels/security',
 'Bad Request', 400, '{"approverIds": ["590359b87320670010970a37"]}', '{"code":400,"message":"New users are not all organization members.","documentationURL":"https://biztera.com/developer"}'
)
Apr 14 18:18:41 ip-172-31-18-38 journal: [18:18:41] ERROR [__main__.autocasa:277] Attempt to set CASA ticket status failed : ('https://biztera.com/api/v1/projects/10449/channels/security', 'F
orbidden', 403, '{"delegatorId": "590359b87320670010970a37", "decision": "done", "decisionLabel": "Completed: No outstanding issues found"}', '{"code":403,"message":"You are not a decision ma
ker for this section.","documentationURL":"https://biztera.com/developer"}')
Apr 14 18:18:41 ip-172-31-18-38 python3: [18:18:41] ERROR [__main__.autocasa:277] Attempt to set CASA ticket status failed : ('https://biztera.com/api/v1/projects/10449/channels/security', 'F
orbidden', 403, '{"delegatorId": "590359b87320670010970a37", "decision": "done", "decisionLabel": "Completed: No outstanding issues found"}', '{"code":403,"message":"You are not a decision ma
ker for this section.","documentationURL":"https://biztera.com/developer"}')