Enable py33 voting in jenkins gating

[Kui Shi]

Currenly, py33 test is enabled in jenkins gating as "non-voting", if the change is failed in py33 test, it still can be merged.

There are a series of commits which fix the problems of py33 test:

py33: don't encode security_group
https://review.openstack.org/#/c/48791/

py33: sort the files parameters of "--files"
https://review.openstack.org/#/c/49756/

py33: use six.StringIO() to mock stdout/stderr
https://review.openstack.org/#/c/49853/

py33: sort hosts while treeize AvailabilityZone
https://review.openstack.org/#/c/49716/

py33: unify the input of request to json format
https://review.openstack.org/#/c/49668/

py33: align the order of parameters for urlencode()
https://review.openstack.org/#/c/49535/

py33: safe_encode() returns bytes in Python 3
https://review.openstack.org/#/c/48212/

py33: iteration order of dict is unpredictable
https://review.openstack.org/#/c/49332/

py33: uuid verification in find_resource()
https://review.openstack.org/#/c/48822/

py33: 'str' does not support the buffer interface
https://review.openstack.org/#/c/48406/

py33: dict.keys() is not a list in python3
https://review.openstack.org/#/c/47771/

py33: 'dict_keys' object does not support indexing
https://review.openstack.org/#/c/47779/

when all of them are merged, the py33 voting can be enabled.

[Kui Shi (skuicloud)]

I thing there should be a dedicated jenkins gating project for this request, but I am not sure.

Help set it to proper project if it is not belong to here.

[Joe Gordon (jogo)]

this change should be done in the openstack-infra/config repo. the fine folks in #openstack-infra can help.

[Clark Boylan (cboylan)]

Joe fixed this in openstack-infra/config change If695f96bf08c272a4b09bc6bbd7c9ddcc2a33bcc.