Description of problem:
Execution time of /bin/tripleo-ansible-inventory way too high

Version-Release number of selected component (if applicable):
[root@undercloud-4 ~]# rpm -qf /bin/tripleo-ansible-inventory
openstack-tripleo-validations-5.5.0-1.el7ost.noarch

Actual results:
[stack@undercloud-4 ~]$ time tripleo-ansible-inventory --list
{"overcloud": {"children": ["controller", "compute"], "vars": {"ansible_ssh_user": "heat-admin"}}, "controller": ["192.168.24.12"], "undercloud": {"hosts": ["localhost"], "vars": {"overcloud_horizon_url": "http://10.0.0.5:80/dashboard", "overcloud_admin_password": "dzd8PRdB4TWGGygkCDGdUHrkY", "ansible_connection": "local"}}, "compute": ["192.168.24.9", "192.168.24.7"]}

real	1m12.398s
user	0m0.779s
sys	0m0.110s


Expected results:
< 1 second execution time on any system

Additional info:
run in a virtual undercloud, however, as this doesn't do anything more than list a few hosts and passwords, it should not take this long