[FIX] test_mail: make some tests independent from other module demo data

There is a test checking message access rights and search results. It
searches for messages created in the test class having a subject like
Test. However this search may return more results than expected. For
example project create messages containing Test. As we want to keep tests
independent let us rename the test data to ensure everything works as
intended.

0 files changed, 0 insertions, 0 deletions