when using ubuntu, dont remove apparmor

[munger1985]

playbooks/roles/openldap/tasks/debian.yml in the file, there is remove apparmor, but ubuntu os depends on snap, snap depends on apparmor, so i think we should remove this code

• name: Remove Apparmor package
  vars:
  package_name:
  - apparmor
  package_state: absent
  package_purge: true
  include_role:
  name: safe_yum