Maas: Nova-cloud-controller Installation: agent-state-info: 'hook failed: "install"'

[Marwan AKIKI]

When installing Nova-cloud-controller using Juju-MAAS on a Virtual Machine; the installation fails and reports as follow:

$ juju status nova-cloud-controller

environment: maas
machines:
  "25":
    agent-state: started
    agent-version: 1.18.4
    dns-name: maas-node-4.maas
    instance-id: /MAAS/api/1.0/nodes/node-c8c350ea-f071-11e3-8d19-52540051f080/
    series: precise
services:
  nova-cloud-controller:
    charm: cs:precise/nova-cloud-controller-40
    exposed: false
    relations:
      cluster:
      - nova-cloud-controller
    units:
      nova-cloud-controller/0:
        agent-state: error
        agent-state-info: 'hook failed: "install"'
        agent-version: 1.18.4
        machine: "25"
        public-address: maas-node-4.maas