Use pretty-tox for better test output

Change-Id: I4f64832e99c479977c57031cc7961fa5c1a49470

test-requirements.txt

@@ -17,6 +17,7 @@ pylint>=1.3.0  # GNU GPL v2
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
 sphinxcontrib-httpdomain
 sqlalchemy-migrate>=0.9.1,!=0.9.2
+tempest-lib
 testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=0.9.36,!=1.2.0

tools/pretty_tox.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -o pipefail
+
+TESTRARGS=$1
+python setup.py testr --slowest --testr-args="--subunit $TESTRARGS" | subunit-trace -f

tox.ini

@@ -12,14 +12,14 @@ setenv =
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args="{posargs}"
+commands = bash tools/pretty_tox.sh '{posargs}'
 whitelist_externals = bash
 
 [testenv:integration]
 setenv =
     VIRTUAL_ENV={envdir}
     DISCOVER_DIRECTORY=sahara/tests/integration
-commands = python setup.py test --slowest --testr-args="{posargs}"
+commands = bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:cover]
 commands = python setup.py testr --coverage --testr-args='{posargs}'