tornadoweb/tornado — pull request #1246 by heewa (2014-11-08 19:44:27+00:00)
Title: Cleanup Subprocess when tearing down AsyncTestCase

Since an ioloop is created and destroyed between a test's `setUp` and
`tearDown`, and Subprocess holds on to an ioloop until `uninitialize`,
this allows the next test case to use Subprocess correctly.