[MOV] mail: reorganize content of tests, separate tests from models and data

Purpose of this commit is to reorganize the mail tests. Containing

 * move test models into mail/tests/models/;
 * move data into mail/tests/data even if it is python code, as it is
   likely that some additional data will appear soon;
 * split test_mail_features into test for discuss app and test related
   to message post and composer, to better identify test target;
 * split and remove test_portal, those tests are now integrated in the
   other tests;

There is no change in this commit. Only some renaming and file move or
split.

mergeup: remove / split test portal

0 files changed, 0 insertions, 0 deletions