Close connection to redis after test finishes
Close connection to redis after test finishes

Previously, connections were being kept open
until all the tests were finished running.  Now
that the number of tests is big enough (awesome!)
this would cause an error after a certain number
of tests (on my dev laptop this was at about 500
connections).  I couldn't find a way to close the
conection to redis other than del'ing the
redis connection in the teardown method.  Now
I'm able to run all the integration tests without
any issues.

Tinche/fakeredis,OnBeep/fakeredis,sam-untapt/fakeredis,fatelei/fakeredis,ze-phyr-us/fakeredis