Add human readable logging callback plugin for func testing

This should make it easier to understand check and gate
failures by analyzing the logs.

Change-Id: I0783e109f34494580658705a0962ab74da5cc20a

tox.ini

@@ -24,6 +24,7 @@ whitelist_externals =
     bash
     git
     rm
+    wget
 setenv =
     VIRTUAL_ENV={envdir}
 
@@ -115,6 +116,9 @@ commands =
     rm -rf {homedir}/.ansible
     git clone https://git.openstack.org/openstack/openstack-ansible-plugins \
               {homedir}/.ansible/plugins
+    # This plugin makes the ansible-playbook output easier to read
+    wget -O {homedir}/.ansible/plugins/callback/human_log.py \
+      https://gist.githubusercontent.com/cliffano/9868180/raw/f360f306b3c6d689734a6aa8773a00edf16a0054/human_log.py
     ansible-galaxy install \
                    --role-file={toxinidir}/tests/ansible-role-requirements.yml \
                    --force