Install required selinux-python bindings in bootstrap

on centos.  The bootstrap tty fixup needs it.

roles/bootstrap-os/tasks/bootstrap-centos.yml

@@ -13,3 +13,15 @@
     line: "enabled=0"
     state: present
   when: fastestmirror.stat.exists
+
+- name: Install packages requirements for bootstrap
+  action:
+    module: "{{ ansible_pkg_mgr }}"
+    name: "{{ item }}"
+    state: latest
+  register: bs_pkgs_task_result
+  until: bs_pkgs_task_result|succeeded
+  retries: 4
+  delay: "{{ retry_stagger | random + 3 }}"
+  with_items: "libselinux-python"
+