Fix #978 -- Allow to split names (#1049)

- [x] attendee names
- [x] Invoice address names
- [x] Data migration
- [x] API serializers
  - [x] orderposition
  - [x] cartposition
  - [x] invoiceaddress
  - [x] checkinlistposition
- [x] position API search
- [x] invoice API search
- [x] business/individual required toggle
- [x] Split columns in CSV exports
- [x] ticket editor
- [x] shredder
- [x] ticket/invoice sample data
- [x] order search
- [x] Handle changed naming scheme
- [x] tests
- [x] make use in:
  - [x] Boabee
  - [x] Certificate download order
  - [x] Badge download order
  - [x] Ticket download order
- [x] Document new MySQL requirement
- [x] Plugins

src/tests/base/test_shredders.py

@@ -54,7 +54,7 @@ def order(event, item):
         item=item,
         variation=None,
         price=Decimal("14"),
-        attendee_name="Peter",
+        attendee_name_parts={'full_name': "Peter", "_scheme": "full"},
         attendee_email="foo@example.org"
     )
     return o
@@ -155,7 +155,7 @@ def test_attendee_name_shredder(event, order):
     }
     s.shred_data()
     order.refresh_from_db()
-    assert order.positions.first().attendee_name is None
+    assert not order.positions.first().attendee_name
     l1.refresh_from_db()
     assert 'Hans' not in l1.data
     assert 'Foo' in l1.data
@@ -186,6 +186,7 @@ def test_invoice_address_shredder(event, order):
             'is_business': False,
             'last_modified': ia.last_modified.isoformat().replace('+00:00', 'Z'),
             'name': '',
+            'name_parts': {},
             'street': '221B Baker Street',
             'vat_id': '',
             'vat_id_validated': False,