Use the new URL that are worldwide accessible

/reviewed-on !126

  This was accidently reverted.

  This save us to call a jio_get later per line in a loop

  The API must relies on Hateoas API based on JIO only.

  Ensure that path is correct if hateoas_url don't finish with '/'

In case, destruction was already requested, the job of this alarm is already over, it can be considered,
cleaned.

Use JSON serialisation case by reusing the KVM Cluster Case.

This code was originally written by Alain Takoudjou, I'm just porting and updating to this new code base.

/reviewed-on nexedi/slapos.core!121

  Now a user can get a token from a configured slapos client or slapos console.

  The new API will unify web site and internal Slap API.

  Keep slapos_jio_backward_compatibility bt5 as a place to store the API while
  the dependent libraries (like erp5.util) isn't migrated.

  This might evolve into a full jio api to written in python

  The user could use the API to list computers or installations