Alert and Case model API documentation is wrong - tags aren't required

[graememeyer]

The alert model API documentation lists "tags" as a required attribute, but TheHive version 3 doesn't include tags in the alert objects that are returned via the API if there aren't any and doesn't require them in alert objects that are submitted via the API.

I would suggest moving this to the "optional attributes" section

Example alert returned from TheHive 3 API:

date         : 1601796212439
severity     : 1
_routing     : 230695f5a6b5610995b66403ba1656e1
updatedBy    : admin
customFields :
_type        : alert
description  : Testing an alert. 1xjjnf5d ...some extra content
lastSyncDate : 1601796212614
source       : Pester
title        : Test alert: 1xjjnf5d [EDITED]
type         : API
follow       : True
createdAt    : 1601796212612
_parent      :
createdBy    : admin
tlp          : 2
_id          : 230695f5a6b5610995b66403ba1656e1
id           : 230695f5a6b5610995b66403ba1656e1
sourceRef    : 70959
_version     : 3
case         : yH1SP3QBHNu4QDwp8Al7
artifacts    : {}
updatedAt    : 1601796220143
status       : Imported

Edit: it looks like the same is true of the case model, which lists tags as "required" when they're not included in the objects returned by the API:

severity     : 2
owner        : admin
_routing     : yH1SP3QBHNu4QDwp8Al7
flag         : False
updatedBy    : admin
customFields :
_type        : case
description  : Testing an alert.

               #### Merged with alert #70959 Test alert: 1xjjnf5d [EDITED]

               Testing an alert. 1xjjnf5d ...some extra content
title        : Test alert
createdAt    : 1598790233283
_parent      :
createdBy    : admin
caseId       : 7
tlp          : 2
metrics      :
_id          : yH1SP3QBHNu4QDwp8Al7
id           : yH1SP3QBHNu4QDwp8Al7
_version     : 5
pap          : 2
startDate    : 1598623605889
updatedAt    : 1601796220104
status       : Open