Import docman v1 content into docman v2

Please note that docman v2 directory is "sealed" for project admins after
migration.
They have to check document permissions before opening up to the world.

Add a conversion utility script:
./src/utils/php-launcher.sh plugins/docman/bin/import_from_docman_v1.php http://localhost/soap/?wsdl admin 114

Part of story #7412 import docman v1 files in docman plugin

Change-Id: I6087779ecf1eefaf0f6203fc09b53b81776f7274
Merge commit 'refs/changes/74/3074/3' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  Import docman v1 content into docman v2

Change-Id: I2b69e341ef9d89929c07cd79f6d746a42db2a6ac
This is Tuleap 7.5.99.46

Change-Id: If4fcabf1dc54921dd031108116837b816bd97915