Install gpg and sudo binary for Debian based systems

apt_key module requires gpg to be installed [1], however Debian do not
include gpg in it's minimal deployment. So we're ensuring that binary
exists before calling apt_key module

sudo is required for rootwrap and is not shipped with Debian by default

[1] https://docs.ansible.com/ansible/latest/modules/apt_key_module.html#requirements

Change-Id: I3005bd733f64319a93ab40b51415f3cb8f51b48d

tasks/openstack_hosts_configure_apt.yml

@@ -15,6 +15,15 @@
 
 # APT configuration tasks that apply on all nodes.
 
+- name: Install gpg tooling for key management
+  apt:
+    name: gnupg
+    state: "{{ openstack_hosts_package_state }}"
+  register: _install_gpg
+  until: _install_gpg  is success
+  retries: 5
+  delay: 2
+
 - name: Add/Remove repositories gpg keys manually
   apt_key:
     id: "{{ key.id | default(omit) }}"

vars/debian.yml

@@ -73,6 +73,7 @@ _openstack_host_metal_distro_packages:
   - rsyslog
   - software-properties-common
   - sysstat
+  - sudo
   - time
   - vlan
   - wget