Some test cleanup

- Tests are based on oslotest.base.BaseTestCase, which uses the
  NestedTempFile fixture, which uses the TempDir fixture, which adds a
  cleanup routine to remove the base temporary directory it creates.
  There's therefore no need for tests to clean up this directory, so all
  the code that does that is removed.
- The eventlet incarnation of tests was trying to make use of the `env`
  external without whitelisting it, resulting in an ugly red deprecation
  warning. This commit adds `env` to whitelist_externals in [testenv].
- A handful of typos in the Beowulf quote are corrected.

Change-Id: I91cc52e00e0a918dadd2a3a771bd322b0f165ed2

1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 00f953f..ba5ebd6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ deps =
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 # We want to support both vanilla stdlib and eventlet monkey patched
+whitelist_externals = env
 commands =
   lockutils-wrapper stestr run --slowest {posargs}
   env TEST_EVENTLET=1 lockutils-wrapper stestr run --slowest {posargs}