csv export in python 3

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Changing iteritems to items works:

• cmsplugin-contact-plus/cmsplugin_contact_plus/actions.py

  Line 77 in 58dbc76

  for k, v in l.iteritems():

• cmsplugin-contact-plus/cmsplugin_contact_plus/actions.py

  Line 92 in 58dbc76

  for k, v in l.iteritems():