DCD-000: unpins cryptography before ansible install

bin/install-ansible

@@ -8,6 +8,5 @@ set -e
 virtualenv --system-site-packages .venv
 source .venv/bin/activate
 pip install -U setuptools
-pip install cryptography==2.7
 pip install ansible==2.7.10
-pip list
+pip list --format legacy