 Test regression link storage new file
 Test regression link storage new file

* Adds regression test for link storage to make sure a new file
  in Blueprint A that should overwrite a file in Blueprint B
  is taken into consideration.

Signed-off-by: Javier Martin Montull <ea6b80e26c65acc242d8916fb6eefa01b123cb69@cern.ch>

minimind/Flask-Collect