Ian Campbell 0483bcb472 delete DockerClientTestCase.client class attribute on tearDownClass
This is a docker.client.Client and therefore contains a connection pool, so
each subclass of DockerClientTestCase can end up holding on to up to 10 Unix
socket file descriptors after the tests contained in the sub-class are
complete.

Before this by the end of a test run I was seeing ~100 open file descriptors,
~80 of which were Unix domain sockets. By cleaning these up only 15 Unix
sockets remain at the end (out of ~25 fds, the rest of which are the Python
interpretter, opened libraries etc).

Signed-off-by: Ian Campbell <ian.campbell@docker.com>
2016-07-20 15:51:22 +01:00
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