Add osusers.views tests

This commit adds tests for the osusers.views module. An incompatibility
with Django 1.8 in EditSshPublicKeyComment has been fixed.

gnuviechadmin/osusers/views.py

@@ -89,7 +89,7 @@ class AddSshPublicKey(
         key = form.save()
         messages.success(
             self.request,
-            _('Successfully added new {algorithm} SSH public key').format(
+            _('Successfully added new {algorithm} SSH public key.').format(
                 algorithm=key.algorithm)
         )
         return redirect(self.get_hosting_package())
@@ -162,7 +162,6 @@ class EditSshPublicKeyComment(
     """
     model = SshPublicKey
     context_object_name = 'key'
-    fields = ['comment']
     template_name_suffix = '_edit_comment'
     form_class = EditSshPublicKeyCommentForm