Fix failed to access pip server when run behind proxy
When we run tempest on the machine behind proxy,the pip command failed to
connect to pypi.python.org to download packages.
Fix it by add another option "passenv" to [testenv] section.
Change-Id: Iedc40a2266be59a2298d5909486a1439f2757b8c
Closes-Bug: #1463978
diff --git a/tox.ini b/tox.ini
index b495fd6..cf7013d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,13 +13,7 @@
[testenv]
setenv = VIRTUAL_ENV={envdir}
OS_TEST_PATH=./tempest/tests
-passenv = OS_STDOUT_CAPTURE
- OS_STDERR_CAPTURE
- OS_TEST_TIMEOUT
- OS_TEST_LOCK_PATH
- OS_TEST_PATH
- TEMPEST_CONFIG
- TEMPEST_CONFIG_DIR
+passenv = OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_TEST_TIMEOUT OS_TEST_LOCK_PATH OS_TEST_PATH TEMPEST_CONFIG TEMPEST_CONFIG_DIR http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
usedevelop = True
install_command = pip install -U {opts} {packages}
whitelist_externals = *