SLA #4750 : SOAP Exemple for search docman item

I add an hardcoded criteria to show how to build this param

Change-Id: I068dd6a164c06c77672d37ecb33d77ce36c31cee
Merge commit 'refs/changes/26/826/2' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  SLA #4750 : SOAP Exemple for search docman item

Change-Id: I912c3d7d431c30db4037ebb86e072a6be54b7f18
This is Tuleap 6.3.99.16

Change-Id: If3c6e21e0d68aa53b97119a428b6ec9ea05cb838