Add integration test option to tox

Take current version of hacking and run it on any
review.openstack.org repository. By default nova is used
  tox -eintegration
but you can pass in any project as an argument. For example:
  tox -eintegration -- openstack keystone

This deletes the project repo after the test.

Partially fixes bug 1186421

Change-Id: I796b7c734459042b1a929afb73434cba62477365

integration-test/test.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Usage: test.sh openstack keystone
+# Note: you can clone from a local file with REPO_ROOT=file:////~/path/to/repo
+set -x
+set -e
+REPO_ROOT=${REPO_ROOT:-https://review.openstack.org/p}
+if [[ -z "$2" ]]; then
+    org=openstack
+    project=nova
+else
+    org=$1
+    project=$2
+fi
+git clone $REPO_ROOT/$org/$project --depth=1
+cd $project
+set +e
+flake8
+cd ..
+rm -rf $project

tox.ini

@@ -18,6 +18,10 @@ downloadcache = ~/cache/pip
 [testenv:pep8]
 commands = flake8
 
+[testenv:integration]
+commands =
+  bash integration-test/test.sh {posargs}
+
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
 commands =