remove concept of openstack-client
Description
remove concept of openstack-client
Since we always use localhost as openstack-client, we may change all openstack calls to be local_action.
If in any case there will be requirement for connecting to openstack from other host we have other options to achieve connection (run on different host, setup transparent proxy, setup vpn/ssh-vpn)
Additionally with ansible 2.5.0 there is some change with propagating vars/delegate_to that will made this role useless in most cases.