Change the variable substitution to manage subroutine in Safe reval, and add...

Change the variable substitution to manage subroutine in Safe reval, and add more tests in Menu to always return good values for HTML::Template (#LEMONLDAP-284)

git-svn-id: svn://svn.forge.objectweb.org/svnroot/lemonldap/branches/lemonldap-ng_version_1_0-bugfixes@1980 1dbb9719-a921-0410-b57f-c3a383c2c641