Deployment with Ubuntu fails because of master node haven't i386 packages

[Victor Ryzhenkin]

ISO:
{"build_id": "2015-03-26_22-54-44", "ostf_sha": "a4cf5f218c6aea98105b10c97a4aed8115c15867", "build_number": "234", "release_versions": {"2014.2-6.1": {"VERSION": {"build_id": "2015-03-26_22-54-44", "ostf_sha": "a4cf5f218c6aea98105b10c97a4aed8115c15867", "build_number": "234", "api": "1.0", "nailgun_sha": "b163f6fc77d6639aaffd9dd992e1ad96951c3bbf", "production": "docker", "python-fuelclient_sha": "e5e8389d8d481561a4d7107a99daae07c6ec5177", "astute_sha": "3f1ece0318e5e93eaf48802fefabf512ca1dce40", "feature_groups": ["mirantis"], "release": "6.1", "fuelmain_sha": "320b5f46fc1b2798f9e86ed7df51d3bda1686c10", "fuellib_sha": "9c7716bc2ce6075065d7d9dcf96f4c94662c0b56"}}}, "auth_required": true, "api": "1.0", "nailgun_sha": "b163f6fc77d6639aaffd9dd992e1ad96951c3bbf", "production": "docker", "python-fuelclient_sha": "e5e8389d8d481561a4d7107a99daae07c6ec5177", "astute_sha": "3f1ece0318e5e93eaf48802fefabf512ca1dce40", "feature_groups": ["mirantis"], "release": "6.1", "fuelmain_sha": "320b5f46fc1b2798f9e86ed7df51d3bda1686c10", "fuellib_sha": "9c7716bc2ce6075065d7d9dcf96f4c94662c0b56"}

Steps to reproduce:
1. Deploy OS, Ubuntu-neutron GRE, Murano, Cinder, HA mode(3 Virtual controllers, 1 Hardware compute)

Actual result:
Deploy fails with message:
Deployment has failed. Method granular_deploy. Failed to execute hook .
---
priority: 1800
type: shell
uids:
- '1'
- '3'
- '2'
- '4'
parameters:
  retries: 3
  cmd: apt-get update
  cwd: "/"
  timeout: 180
  interval: 1
.
Inspect Astute logs for the details

In astute logs we can see:
W: Failed to fetch http://10.20.1.2:8080/2014.2-6.1/ubuntu/x86_64/dists/mos6.1/restricted/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
exit code: 100

Repos was configured by default.
Snapshot attached.