scripts: bootstrap-ansible: Add required packages on openSUSE Leap
scripts: bootstrap-ansible: Add required packages on openSUSE Leap

Add support for installing required packages on openSUSE hosts.
Moreover, we force python2 on openSUSE since the shipped python-3.4
is not supported by Ansible upstream.

Link: https://github.com/ansible/ansible/issues/24180
Change-Id: I4ce2a066a32cf7a3b552f30788fe2c73511f99d0

yanyao/openstack-ansible,bunchc/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,bunchc/openstack-ansible,yanyao/openstack-ansible,stackforge/os-ansible-deployment,cfarquhar/openstack-ansible,cfarquhar/openstack-ansible,openstack/openstack-ansible