api unittest failed when proxy enabled

[Lianhao Lu]

When we have proxy enabled in the OS, e.g. having set environment variable http_proxy, the unit test ceilometer.tests.test_bin.BinApiTestCase.test_v2 would fail as the following output:

ERROR: ceilometer.tests.test_bin.BinApiTestCase.test_v2
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/stack/ceilometer/ceilometer/tests/test_bin.py", line 207, in test_v2
    self.assertEqual([], json.loads(content))
  File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 384, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/147735

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/147735
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=04e6220d797935abb772f321252fd6ca38acaf8f
Submitter: Jenkins
Branch: master

commit 04e6220d797935abb772f321252fd6ca38acaf8f
Author: Lianhao Lu <email address hidden>
Date: Fri Jan 16 11:18:34 2015 +0800

    Disable proxy in unit test case of test_bin

    Do not use system proxy in unit test cases in test_bin.

    Change-Id: Ic64ca777e7f5784122e9a3d539580dc7d17f9265
    Closes-Bug: #1411493