Fix for HP 3rd Party CI failure

This patchset fixes the problem in HP L2GW CI where timeout
errors were reported.
Patchset also ensures that all the tests run in sequential order.

Change-Id: I977b52ba87112b3d5b7aefee408bd3d14c632fec
Closes-bug: 1517758

.testr.conf

@@ -2,7 +2,7 @@
 test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
              OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
              OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
-             ${PYTHON:-python} -m subunit.run discover -t ./  ${OS_TEST_PATH:-./networking_l2gw/tests/unit} $LISTOPT $IDOPTION
+             ${PYTHON:-python} -m subunit.run discover -t ./  ${OS_TEST_PATH:-./networking_l2gw/tests/api} $LISTOPT $IDOPTION
 test_id_option=--load-list $IDFILE
 test_list_option=--list
 

tools/pretty_tox_serial.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -o pipefail
+
+TESTRARGS=$@
+
+if [ ! -d .testrepository ]; then
+    testr init
+fi
+testr run --subunit $TESTRARGS | subunit-trace -f -n
+retval=$?
+testr slowest
+
+exit $retval

tox.ini

@@ -10,7 +10,9 @@ install_command = {toxinidir}/tools/tox_install.sh {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 whitelist_externals = sh
-commands = python setup.py testr --slowest --testr-args='{posargs}'
+commands =
+         find . -type f -name "*.pyc" -delete
+         bash tools/pretty_tox_serial.sh '{posargs}'
 
 [testenv:pep8]
 commands =
@@ -36,7 +38,9 @@ builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build
 
 [testenv:api]
+# This must be set manually in your environment until
+# a new release of tox fixes the issues with setenv
+TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
 setenv = OS_TEST_PATH=./networking_l2gw/tests/api
-         TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
          OS_TEST_API_WITH_REST=1
          OS_TEST_TIMEOUT=90