Allow to search for templates in several directories (works with partial too)

Change-Id: I5d6e7b7a704a9044d8a69ec6b40724ea19756978
Merge commit 'refs/changes/37/2237/2' of http://gerrit.tuleap.net/tuleap into stable

* http://gerrit.tuleap.net/tuleap:
  Allow to search for templates in several directories (works with partial too)
This is Tuleap 6.12.99.6

Change-Id: I5c5fd8f35bfba8d16476e791d591ad9c1e7662f0