Add missing env vars from unit test job

This commit fixes an oversight in the tox job definitions for unit
tests. Because for better or worse we still use oslotest as the base
test class for tempest's unit tests the stdout, stderr, and logging
capture fixtures are only enabled by an env var. We were never setting
that, so these things weren't captured. This commit fixes the oversight
to enable the capture of these once again.

Change-Id: I81e4077dfda9e9a8a8001f52955ab0164f39d31d
diff --git a/tox.ini b/tox.ini
index 892b6f4..5644641 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,9 @@
 setenv =
     VIRTUAL_ENV={envdir}
     OS_LOG_CAPTURE=1
+    OS_STDOUT_CAPTURE=1
+    OS_STDERR_CAPTURE=1
+    OS_TEST_TIMEOUT=160
     PYTHONWARNINGS=default::DeprecationWarning
 passenv = OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_TEST_TIMEOUT OS_TEST_LOCK_PATH TEMPEST_CONFIG TEMPEST_CONFIG_DIR http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY ZUUL_CACHE_DIR REQUIREMENTS_PIP_LOCATION GENERATE_TEMPEST_PLUGIN_LIST
 usedevelop = True