REST Admin feature is now installed and enabled by default

Configuration files are present in TeamForCapella/server/configuration/fr.obeo.dsl.viewpoint.collab.server.admin
   - admin-server.properties: 
      - by default the webservices are available in http on port 8080, port can be changed, https can be enabled
      - data will be created and managed in the TeamForCapella/server/dynamic folder
      - see documentation for other configuration possibilities
   - secret.txt: the default password to execute webservices 
      - the first time the server is started the file is generated. Store the password in your password manager and then delete the file.
      - the secret is generated token for the login "admin".
      - the secret is "system user" dependant: a new secret can be generated if you launch the server from a new user (Jenkins service, ...)
      - the first time the server is started, the secret value is also saved in the secure storage of tools (importer.bat, exporter.bat, command.bat and Scheduler jobs)
      - To manage the secure storage by regenerating the "admin" token or adding users, you can use the Tools Credentials application. See the related documentation for more details.
   - (optional) activate the Net4J WebSocket-based transport
      - see server and client instructions described in admin-server.properties
   - (optional) update realm with new credentials
      - see jobs in Scheduler's "Credentials" tab.  

To enable the openapi: 
- Stop the server (for example with job "Server - Stop" in the Scheduler)
- Change the configuration in admin-server.properties: set admin.server.jetty.servlets.admin.docandopenapi.enabled to true
- Start the server (for example with job "Server - Run" in the Scheduler)

Once started, the documentation and openapi will be available on http://localhost:8080/doc (default config).