Python exception pass (see request #4112)

Change-Id: I156594cac0876d5c775cf9a053f977477ec648d0
Merge commit 'refs/changes/73/573/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Python exception pass (see request #4112)

Change-Id: I37fcf66c0b4c657ab732a6c3f3e7d851196f9f69
This is Tuleap 6.2.99.3

Change-Id: Ibd5b8a711780e453f1b0582acb82ab281c05031a