CORD-2084 Explicitly install cryptography package

Change-Id: I82838bf61bc4c66edbb86253b6d8e9ac6cb1202b
diff --git a/roles/ansible/tasks/main.yml b/roles/ansible/tasks/main.yml
index 6edffcb..2c3ca1a 100644
--- a/roles/ansible/tasks/main.yml
+++ b/roles/ansible/tasks/main.yml
@@ -10,6 +10,10 @@
     - libssl-dev
     - sshpass
 
+- name: Install Cryptography package via pip
+  pip: name=cryptography version=1.9
+  become: yes
+
 - name: "Install Ansible via pip"
   pip: name=ansible version=2.2.2.0
   become: yes