Do a full yum update to make sure packages are latest version

For the deps setup of integration tests, as we sometimes see odd
errors we can't reproduce, which may be related to slightly out of
date package dependencies.

test/utils/ansible-playbook_integration_runner/roles/ansible_test_deps/tasks/main.yml

@@ -55,8 +55,12 @@
     - python-virtualenv
   when: ansible_os_family == 'Debian'
 
-- name: update ca certificates
+#- name: update ca certificates
-  yum: name=ca-certificates state=latest
+#  yum: name=ca-certificates state=latest
+#  when: ansible_os_family == 'RedHat'
+
+- name: update all rpm packages
+  yum: name=* state=latest
   when: ansible_os_family == 'RedHat'
 
 - name: Install ubuntu 12.04 ansible dependencies