tearDown tmp_volumes array itself in VolumeTest
tearDown tmp_volumes array itself in VolumeTest

Each volume in the array holds a reference to a docker.client.Client object and
therefore a connection pool which leaves fds open once the test has completed.

Signed-off-by: Ian Campbell <9be92b3dbbd6611e3e4c9209fb3d04b4919e7cca@docker.com>

schmunk42/compose,schmunk42/compose,michael-k/docker-compose,thaJeztah/compose,swoopla/compose,vdemeester/compose,andrewgee/compose,shin-/compose,GM-Alex/compose,jrabbit/compose,hoogenm/compose,dbdd4us/compose,hoogenm/compose,dbdd4us/compose,dnephin/compose,thaJeztah/compose,dnephin/compose,sdurrheimer/compose,jrabbit/compose,vdemeester/compose,michael-k/docker-compose,denverdino/compose,funkyfuture/docker-compose,GM-Alex/compose,swoopla/compose,denverdino/compose,funkyfuture/docker-compose,andrewgee/compose,shin-/compose,sdurrheimer/compose