meta: Add CentOS and openSUSE as supported distributions
meta: Add CentOS and openSUSE as supported distributions

The role already supports CentOS and openSUSE so add the related
metadata information.

Change-Id: I7198301ac137a2f6f48da0bb9e735e7f7220e4a8

os-cloud/openstack-ansible-pip_install,openstack/openstack-ansible-pip_install,openstack/openstack-ansible-pip_install,os-cloud/openstack-ansible-pip_install