Convert doc of svn repo import to reStructuredText.

We need to remove the legacy administration documentation from the
sources of Tuleap. This is a first step.

Change-Id: Ib2c41a2a19327c804fd26aa52a02060de1624b8d
Merge commit 'refs/changes/21/2021/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Convert doc of svn repo import to reStructuredText.

Change-Id: I8c09a067b79156392d2a932bd852b48a59a232f0
This is Tuleap 6.10.99.64

Change-Id: Idc7746209db6f997fd5eaaa6820e6cde760b4e80