Fix deployment and configuration

* Add default 'theme' ansible configuration for cas-server and remove the one on referential
* Dirty adaptation of referential app ansible deployment script (todo : define correct mongo script versionning)
* Replace vitamui_env_name by vitamui_site_name
* Fix referential-internal module default vitam dev conf

Co-authored-by: benemart <benedicte.martinez@cea.fr>
Co-authored-by: Maël QUAISSARD <mael.quaissard@smile.fr>
Co-authored-by: Ro3034 <romaingordolo@gmail.com>