Move py_vulcanize/run_py_tests and make it disabled by default.

Move py_vulcanize/run_py_tests and make it disabled by default.

The purpose of this CL is to make it so that
https://codereview.chromium.org/1377973007 can be committed again,
so that I can use try jobs to debug the py_vulcanize tests.

BUG=#1584

Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/95902610bc2c303d3d136c5905781f36e4f14ab8

[qyearsley, 2015-10-27 16:58:01]

qyearsley@chromium.org changed reviewers:
+ sullivan@chromium.org

[sullivan, 2015-10-27 17:07:27]

lgtm

[qyearsley, 2015-10-27 17:23:00]

The CQ bit was checked by qyearsley@chromium.org

[qyearsley, 2015-10-27 17:23:00]

The CQ bit was unchecked by qyearsley@chromium.org

[qyearsley, 2015-10-27 17:23:03]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2015-10-27 17:23:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1422623008/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1422623008/1

[commit-bot: I haz the power, 2015-10-27 17:30:15]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...