improve unit tests for wsgi module

[dan wendlandt]

OpenStack quantum.wsgi package includes a lot of components not covered with unit tests.

Add unittests for the following classes:

Serializer
RequestDeserializer
ResponseSerializer
Request
ActionDispatcher
ResponseHeadersSerializer
DictSerializer
XMLDictSerializer
JSONDictSerializer
TextDeserializer
JSONDeserializer
XMLDeserializer
RequestHeadersDeserializer
Resource
Fault

[dan wendlandt (danwent)]

using this bug to track work previously at: https://blueprints.launchpad.net/quantum/+spec/quantum-wsgi-unittests

no blueprints can be accepted for grizzly, but this work is ok as a bug, since it modifies only unit tests.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/23270

[dan wendlandt (danwent)]

this is non-essential, moving to havana

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/20692
Committed: http://github.com/openstack/quantum/commit/8499d50259d7f7c01de6dad08b660afa5544af4d
Submitter: Jenkins
Branch: master

commit 8499d50259d7f7c01de6dad08b660afa5544af4d
Author: Tatyana Leontovich <email address hidden>
Date: Tue Jan 29 16:29:13 2013 +0200

    Improve test coverage for quantum wsgi module

    OpenStack quantum.wsgi package includes a lot of classes not covered
    with unit tests. This change adds such unit tests.

    Fixes: bug #1136027
    Change-Id: I16dd35389bf82f2818b74d1fb4cf7f7a6bebce28