Fixes #3376 : add Global Parameter into Rudder
Fixes #3691: adding Global Parameters into workflows
Refs #3686 : add a default entry in ldif for global parameter for file edition header
Fixes #3714 refs 3349: Add the scala logic to migrate from XML file format 3 to 4
Better handling of parameters

Add case insensitivity, param in the middle of text, several param,
recurrent param, missing special chars and error on path starting with rudder not handled
Fixes #3691 : correct workflow behaviour for global parameters
Fixes #3739 : API Rest for Parameters