Nailgun can't provide default deployment settings for env

[Sergey Vasilenko]

Separate provisioning and deployment.

I want to save default astute.yaml files for env before provisioning.

But Nailgun trow error:
[root@nailgun ~]# fuel --env=1 deployment --default
500 Server Error: Internal Server Error ('ErrorFactory' object has no attribute 'SerializerNotSupported')

More detailed screenshot is http://paste.openstack.org/show/eFpqRE0JYWcYRcxXrZf3/

More detailed logs will be in debug snapshot.

fuel-createmirror_sha: "fe81731b76071dc0a4ffdf039080732243f5a871"
fuelmain_sha: "f5b83e3f0ccfce90b9ca797bc039c9ab50b5ee55"
astute_sha: "a090546d43c770ac27ca81c6f8c78ff0ba4a93e0"
fuel-ostf_sha: "e308a7ad68838f6e012d6d80243eb32b4f7e6c18"
fuel-library_sha: "622f595dfb40aead86c3b00693ae4498a45a1f52"
fuel-nailgun-agent_sha: "08e0a11cf1f29b705e4b910d9b9db5e9b708b6e3"
fuel-nailgun_sha: "32a2b80e446003e6109fa6cb74f111fc13b1be3a"
fuel-agent_sha: "5d2d5e2e9ad4f8bb01e450240d85447608d84b92"
python-fuelclient_sha: "93a2e63d2a035c3f6f8ac2f7c3ba22b89696bbef"

[Aleksey Kasatkin (alekseyk-ru)]

http://paste.openstack.org/show/476506/

[Sergey Vasilenko (xenolog)]

Debug snapshot here: https://drive.google.com/file/d/0BwNB1Fj6mQMBMnkteHNEclYtUzA/view?usp=sharing
Sorry, LP doesn't allow to download files today.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/240201

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/240201
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=773f87d210fb412f585a3a4ed13406b4d8cdf782
Submitter: Jenkins
Branch: master

commit 773f87d210fb412f585a3a4ed13406b4d8cdf782
Author: Artem Roma <email address hidden>
Date: Thu Oct 29 13:33:15 2015 +0200

    Add SerializerNotSupported error type to nailgun.errors

    Now in case when type of task is not known to Nailgun proper error is
    thrown.

    Change-Id: I33923c04e3eba0ed8028efac51e36f347296d0ae
    Closes-Bug: #1506915

[Veronica Krayneva (vkrayneva)]

Verified on #491