Follow up: Fixed issue #519 - Import of articles without a content type fails.

spec/fixtures/import/otrs/article/no_content_type.json

@@ -0,0 +1,104 @@
+{
+  "Age": 200536176,
+  "PriorityID": "3",
+  "ContentType": null,
+  "DynamicField_SugarCRMCompanySelection": [
+    "Firma 1 - 117c26c0-11d4-7b8b-cb8f-4f7cb6823dd8",
+    "Firma 2 - 1111111-11d4-7b8b-cb8f-4f7cb6823dd8",
+    "Firma 3 - 22222222-11d4-7b8b-cb8f-4f7cb6823dd8"
+  ],
+  "ServiceID": null,
+  "TicketFreeText11": null,
+  "DynamicField_ITSMDueDate": null,
+  "DynamicField_Topic": null,
+  "StateID": "1",
+  "DynamicField_Hostname": null,
+  "Body": "Welcome!\n\nThank you for installing OTRS.\n\nYou will find updates and patches at http://www.otrs.com/open-source/.\nOnline documentation is available at http://doc.otrs.org/.\nYou can also use our mailing lists http://lists.otrs.org/\nor our forums at http://forums.otrs.org/\n\nRegards,\n\nThe OTRS Project\n",
+  "DynamicField_ZammadMigratorChanged": null,
+  "EscalationTime": "0",
+  "Changed": "2014-06-24 09:32:14",
+  "OwnerID": "1",
+  "DynamicField_ZarafaTN": null,
+  "DynamicField_ProcessManagementActivityID": null,
+  "DynamicField_TopicID": null,
+  "DynamicField_ScomHostname": null,
+  "Owner": "root@localhost",
+  "AgeTimeUnix": 82611378,
+  "TicketFreeKey11": null,
+  "ArticleID": "999",
+  "Created": "2010-08-02 14:00:00",
+  "DynamicField_ScomUUID": null,
+  "DynamicField_TicketFreeText11": null,
+  "DynamicField_TicketFreeKey11": null,
+  "DynamicField_ITSMReviewRequired": null,
+  "DynamicField_OpenExchangeTicketNumber": null,
+  "DynamicField_ITSMDecisionDate": null,
+  "ArticleTypeID": "1",
+  "QueueID": "2",
+  "ReplyTo": null,
+  "DynamicField_ITSMImpact": null,
+  "TicketID": "999",
+  "DynamicField_ITSMRecoveryStartTime": null,
+  "Cc": null,
+  "EscalationResponseTime": "0",
+  "DynamicField_ProcessManagementProcessID": null,
+  "IncomingTime": "1280750400",
+  "Charset": "",
+  "DynamicField_CheckboxExample": null,
+  "DynamicField_Location": null,
+  "CustomerUserID": "1000001",
+  "DynamicField_Vertriebsweg": null,
+  "Attachments": [],
+  "DynamicField_CustomerLocation": null,
+  "DynamicField_SugarCRMRemoteID": null,
+  "DynamicField_OpenExchangeTN": null,
+  "Service": "",
+  "Type": "Incident",
+  "ContentCharset": "",
+  "DynamicField_TETest": [
+    "test",
+    "test1",
+    "test3"
+  ],
+  "Responsible": "root@localhost",
+  "SenderType": "customer",
+  "ResponsibleID": "1",
+  "SLA": "",
+  "MimeType": "",
+  "DynamicField_Combine": "22222222-11d4-7b8b-cb8f-4f7cb6823dd8",
+  "Subject": "Welcome to OTRS!",
+  "InReplyTo": null,
+  "RealTillTimeNotUsed": "0",
+  "DynamicField_ScomService": null,
+  "CustomerID": "1000001",
+  "TypeID": null,
+  "MessageID": "<007@localhost>",
+  "Priority": "3 normal",
+  "To": "Your OTRS System <otrs@localhost>",
+  "DynamicField_SugarCRMCompanySelectedID": "22222222-11d4-7b8b-cb8f-4f7cb6823dd8",
+  "UntilTime": 0,
+  "EscalationUpdateTime": "0",
+  "CreatedBy": "1",
+  "Queue": "Raw",
+  "DynamicField_ITSMRepairStartTime": null,
+  "ToRealname": "Your OTRS System",
+  "State": "new",
+  "SenderTypeID": "3",
+  "DynamicField_ZammadMigratorChangedOld": null,
+  "Title": "Welcome to OTRS!",
+  "DynamicField_ScomState": null,
+  "References": null,
+  "DynamicField_Department": null,
+  "ArticleType": "email-external",
+  "StateType": "new",
+  "FromRealname": "OTRS Feedback",
+  "EscalationSolutionTime": "0",
+  "LockID": "2",
+  "TicketNumber": "2010080210123456",
+  "DynamicField_ITSMDecisionResult": null,
+  "Lock": "lock",
+  "CreateTimeUnix": "1280750400",
+  "SLAID": null,
+  "DynamicField_ITSMCriticality": null,
+  "From": "OTRS Feedback <feedback@otrs.org>"
+}