Note about jmespath requirement for control node (#599)

Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>

playbooks/provisioning/openstack/README.md

@@ -10,6 +10,7 @@ etc.). The result is an environment ready for openshift-ansible.
 * [Ansible-galaxy](https://pypi.python.org/pypi/ansible-galaxy-local-deps)
 * [jinja2](http://jinja.pocoo.org/docs/2.9/)
 * [shade](https://pypi.python.org/pypi/shade)
+* python-jmespath / [jmespath](https://pypi.python.org/pypi/jmespath)
 * python-dns / [dnspython](https://pypi.python.org/pypi/dnspython)
 * Become (sudo) is not required.
 

playbooks/provisioning/openstack/prerequisites.yml

@@ -20,6 +20,16 @@
       that: 'shade_result.rc == 0'
       msg: "Python module shade is not installed"
 
+  # Check jmespath
+  - name: Try to import python module shade
+    command: python -c "import jmespath"
+    ignore_errors: yes
+    register: jmespath_result
+  - name: Check if jmespath is installed
+    assert:
+      that: 'jmespath_result.rc == 0'
+      msg: "Python module jmespath is not installed"
+
   # Check python-dns
   - name: Try to import python DNS module
     command: python -c "import dns"