Install tox and git-review with DIB

Instead of installing these things in puppet[1] we can build them into
the image. This also carries-over a TODO to install git-review in a
virtualenv and update jobs to use it.

[1] http://git.openstack.org/cgit/openstack-infra/system-config/tree/modules/openstack_project/manifests/single_use_slave.pp?id=b3f8b4106c2d391c60f4c3c10e1b6c313b211f17#n47
Change-Id: Ibe427f8b43312f58b4a1a4a1205b764a9d2d79e9

nodepool/elements/infra-package-needs/install.d/10-pip-packages

@@ -0,0 +1,29 @@
+#!/bin/bash
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+#
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# dib-lint: disable=setu setpipefail
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -e
+
+# TODO(fungi): switch jobs to use /usr/git-review-env/bin/git-review
+packages='git-review==1.25.0 '
+packages+='tox '
+
+for package in $packages ; do
+    pip install $package
+done