Use extra_vars to pass ireallymeanit

The ireallymeanit parameter does not work when passed using
vars in the ansible inventory. This change passes the option
using extra_vars.

Change-Id: Iabf9e20e65f7def1bbbc48995cbc956937a69e15
Related-Bug: #1745494

workbooks/ceph-ansible.yaml

@@ -150,6 +150,8 @@ workflows:
           ssh_private_key: <% $.private_key %>
           skip_tags: <% $.ansible_skip_tags %>
           extra_env_variables: <% $.ansible_extra_env_variables.mergeWith($.ansible_env_variables) %>
+          extra_vars:
+            ireallymeanit: 'yes'
         publish:
           output: <% task().result %>
         on-complete: purge_fetch_directory