Savanna tests to create, list, start, checks and delete cluster doesn`t find savanna tag 4.0

{"build_id": "2013-12-25_01-01-41",
"ostf_sha": "a27665008e961b773861b95969acf61d25f0f977",
"build_number": "202",
 "nailgun_sha": "d4aecc4f1b60d66021bac195800952fb94cbc627",
"fuelmain_sha": "15f575db2d35e3374a217e29a38091152801cfe5",
 "astute_sha": "9000b12aa0f3639bd4a18efeb82ef554fdbde9c0",
 "release": "4.0",
"fuellib_sha": "cc0301c5f0399e7567230d5cf261f0796005d91c"}

Steps to reproduce:
1. Create cluster with the following configuration:
    - CentOs multinode;
    - nova-network VLAN;
    - ceph for volumes;
    - savanna;
2. Add the following nodes:
    - 1 controller;
    - 1 compute;
    - 2 Ceph OSD;
3. Deploy cluster.
4. Download Savanna image and upload it to Glance under admin user.
5. Create valid security group rules for default security group (for ports 22, 8080, 50070, 50030, 80).
6. Register Savanna image in savanna image registry.
7. Run OSTF.

Expected result:
OSTF test "Savanna tests to crate, list, start, checks and delete cluster" passes.

Actual result:
OSTF test "Savanna tests to crate, list, start, checks and delete cluster" fails. There is the following trace in OSTF logs:

fuel_health.savanna: DEBUG: Savanna image metadata is {u'_savanna_username': u'ubuntu', u'_savanna_description': None}
fuel_health.common.test_mixins: DEBUG: Traceback (most recent call last):
  File "/opt/fuel_plugins/ostf/lib/python2.6/site-packages/fuel_health/common/test_mixins.py", line 186, in verify
    result = func(*args, **kwargs)
  File "/opt/fuel_plugins/ostf/lib/python2.6/site-packages/fuel_health/savanna.py", line 80, in _test_image
    if image.metadata[tag_version] == 'True'\
KeyError: '_savanna_tag_1.2.1'