looks like installation issue due to virtualenv-within-a-virtualenv, add some more debugging related to that

.travis.yml

@@ -4,6 +4,9 @@ python:
 sudo: required
 dist: trusty
 before_install:
+- type -a python
+- type -a python3
+- env
 - lsb_release -a
 - echo $PATH
 - id
@@ -13,8 +16,12 @@ before_install:
 - sudo apt-get -qq update
 - sudo apt-get install -y ansible
 install:
+- type -a virtualenv
+- virtualenv -- version
 - ansible-playbook -vvv --extra-vars="brozzler_pip_name=file://$TRAVIS_BUILD_DIR#egg=brozzler user=travis" --inventory-file=ansible/hosts-localhost ansible/playbook.yml
 - pip install $TRAVIS_BUILD_DIR pytest
+- type -a virtualenv
+- virtualenv -- version
 - ls -l /opt /opt/*/bin /opt/*/lib/python3.4/site-packages
 - cat /etc/init/warcprox.conf
 - cat /etc/init/brozzler-worker.conf