Resolve "name of the voucher partner shouldn't be split into first name/last name"

added 13 commits

f6b7dfe5 - debug print removed
4d524b21 - adding worker with password mismatch doesn't crash system anymore
a03b7d85 - data inside table cells are modified by templates
77728535 - number is shortened by one digit
a042a82b - voucher partner code comes befor voucher type code in the voucher number
50714faa - voucher contains activity_type field
4f56c348 - activity_type is disabled when editing voucher
25fc7b14 - activity_type is part of voucher type
9b868369 - activity_type is included on printable voucher
0302719f - unit test for checking voucher template replacements
4e57c19e - list of exceeded visits doesn't include visits with ascheduled appointments
a18c3e66 - visit is marked as exceeded when time of the visit is exceeded and there are no…
ce258019 - voucher partners have name (instead of using first name and last name)