devstack-gate run fails with "ValueError: No closing quotation" from shlex module

Seen here:

http://logs.openstack.org/88/256388/1/gate/gate-designate-dsvm-powerdns/9a48601/console.html.gz#_2015-12-16_13_56_43_534

2015-12-16 13:56:43.257 | 2015-12-16 13:56:43.229 | /opt/stack/new/designate /opt/stack/new/designate/devstack/gate
2015-12-16 13:56:43.534 | 2015-12-16 13:56:43.506 | Traceback (most recent call last):
2015-12-16 13:56:43.536 | 2015-12-16 13:56:43.509 | File "/usr/local/bin/tox", line 11, in <module>
2015-12-16 13:56:43.539 | 2015-12-16 13:56:43.511 | sys.exit(cmdline())
2015-12-16 13:56:43.541 | 2015-12-16 13:56:43.513 | File "/usr/local/lib/python2.7/dist-packages/tox/session.py", line 38, in main
2015-12-16 13:56:43.546 | 2015-12-16 13:56:43.518 | config = prepare(args)
2015-12-16 13:56:43.582 | 2015-12-16 13:56:43.520 | File "/usr/local/lib/python2.7/dist-packages/tox/session.py", line 26, in prepare
2015-12-16 13:56:43.583 | 2015-12-16 13:56:43.522 | config = parseconfig(args)
2015-12-16 13:56:43.583 | 2015-12-16 13:56:43.525 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 229, in parseconfig
2015-12-16 13:56:43.583 | 2015-12-16 13:56:43.527 | parseini(config, inipath)
2015-12-16 13:56:43.583 | 2015-12-16 13:56:43.529 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 729, in __init__
2015-12-16 13:56:43.583 | 2015-12-16 13:56:43.531 | self.make_envconfig(name, section, reader._subs, config)
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.533 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 760, in make_envconfig
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.534 | res = meth(env_attr.name, env_attr.default)
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.538 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 929, in getargvlist
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.539 | return _ArgvlistReader.getargvlist(self, s)
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.546 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 1100, in getargvlist
2015-12-16 13:56:43.584 | 2015-12-16 13:56:43.548 | commands.append(cls.processcommand(reader, current_command))
2015-12-16 13:56:43.585 | 2015-12-16 13:56:43.550 | File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 1140, in processcommand
2015-12-16 13:56:43.585 | 2015-12-16 13:56:43.552 | argv = list(shlexer)
2015-12-16 13:56:43.585 | 2015-12-16 13:56:43.554 | File "/usr/lib/python2.7/shlex.py", line 269, in next
2015-12-16 13:56:43.585 | 2015-12-16 13:56:43.557 | token = self.get_token()
2015-12-16 13:56:43.587 | 2015-12-16 13:56:43.559 | File "/usr/lib/python2.7/shlex.py", line 96, in get_token
2015-12-16 13:56:43.589 | 2015-12-16 13:56:43.561 | raw = self.read_token()
2015-12-16 13:56:43.592 | 2015-12-16 13:56:43.564 | File "/usr/lib/python2.7/shlex.py", line 172, in read_token
2015-12-16 13:56:43.597 | 2015-12-16 13:56:43.569 | raise ValueError, "No closing quotation"
2015-12-16 13:56:43.603 | 2015-12-16 13:56:43.571 | ValueError: No closing quotation

Which is coming from:

https://github.com/openstack/designate/blob/master/devstack/gate/run_tempest_tests.sh#L32

But this hits in a lot of projects:

http://logstash.openstack.org/#dashboard/file/logstash.json?query=message:%5C%22ValueError:%20No%20closing%20quotation%5C%22%20AND%20tags:%5C%22console%5C%22%20AND%20voting:%5C%221%5C%22%20AND%20NOT%20build_queue:%5C%22experimental%5C%22