Context:

Since 6.2, 3 userroles were introduced: rest-admin, rest-anonymous, and rest-editor. Those 3 userroles are not compliant with the new usergroups in 6.3: editors, publishers, and developers.

Things to review/revamp:

1. Naming for user roles to compliant with new default usergroups
   1. rest-admin could be rest-developer
   2. rest-editor is used to access rest delivery endpoints, but there is no Create, Update, and Delete performance in practice. So it can be changed to rest-viewer or another name that is relevant to a role that can only access to retrieve REST outcomes
2. Assigning
   1. rest-admin (or rest-developer) assigns to the developer group
   2. rest-editor (or rest-viewer) assigns to the editors and publishers group
3. Deprecated logics of version handler
   1. RestIntegrationModuleVersionHandler.java
   2. RestToolsModuleVersionHandler.java