SeedDB bulk import of organizations and rooms crashes on misformatted attribute lists

[lunkwill42]

It appears the bulk import code for Organization and Room does not attempt to properly validate the syntax of their attr fields, causing a ValueError crash (NAV 4.7.0 and earlier).

As an example, attempting to bulk import this as an Organization:

INGSOC::English Socialism:doubleplusgood

will result in a crash with a traceback that looks like this:

ValueError: dictionary update sequence element #0 has length 1; 2 is required
Traceback (most recent call last): 
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) 
File "/usr/lib/python2.7/dist-packages/nav/web/seeddb/page/organization.py", line 95, in organization_bulk extra_context=info.template_context) 
File "/usr/lib/python2.7/dist-packages/nav/web/seeddb/utils/bulk.py", line 46, in render_bulkimport processed = form.bulk_process_check(importer) 
File "/usr/lib/python2.7/dist-packages/nav/web/seeddb/forms/bulk.py", line 99, in bulk_process_check for line_num, objects in importer: 
File "/usr/lib/python2.7/dist-packages/nav/bulkimport.py", line 49, in next objects = self._create_objects_from_row(row) 
File "/usr/lib/python2.7/dist-packages/nav/bulkimport.py", line 215, in _create_objects_from_row attributes = dict([attr.split('=', 1) for attr in row.get('attr', [])]) 
ValueError: dictionary update sequence element #0 has length 1; 2 is required