Allow ssh to overcloud nodes in inventory

Right now if you attempt to perform a task on
an overcloud node in a oooq playbook the ssh
connection fails because the inventory entry
does not add the ssh_extra_args command pointing
at the ssh config file.

This corrects that and allows tasks to be run
against the overcloud nodes.

Change-Id: I05caa7bb325fc7cc7cddb43e5781b5336972e35d

roles/tripleo-inventory/tasks/main.yml

@@ -43,6 +43,7 @@
         ansible_fqdn: '{{ item.value }}'
         ansible_user: 'heat-admin'
         ansible_private_key_file: "{{ local_working_dir }}/id_rsa_overcloud"
+        ansible_ssh_extra_args: '-F "{{ local_working_dir }}/ssh.config.ansible"'
 
 #required for regeneration of ssh.config.ansible
 - name: set_fact for undercloud ip