tasks #7062 Create default mapping for docaman

 * Changing /tuleap/docman/:project_id in /docman/:project_id
 * GET current mapping for project
 * Applying default mapping if not exists (with file and perms)
 * Add new doc is OK
 * REFACTORING

Change-Id: Ib5ae9f59cb25e6370df8fd66e548e50500474784
Merge commit 'refs/changes/44/2644/6' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7062 Create default mapping for docaman

Change-Id: Iee53cd37425222b00323df531817979d2041c37c
This is Tuleap 7.1.99.43

Change-Id: I4ea2cca5e978d5afc555d501b954f7d7057f5907