Rudder

We want to have the following behaviour:

- for new install of 3.1/3.2, we want to enable by default JSscript, Node properties expansion and quicksearch
- for existing instance migrated, we want them to be disabled (no behavior change)
- for future migration, we want to keep the same behavior as the one configured by the user

So we need to :

- add in boostrap.ldif "feature enabled" for the three of them, so that future migration don't thing there are not set,
- add "disable feature" in a migration script, to avoid changing behavior of existing config.