Fix host bootstrap pkg removal on Debian

The variable names are awful but this all agrees with the docs now.

Closes-Bug: #1933122
Change-Id: Icd3d140473886ba3c4847859cddccdb3c1376818

ansible/roles/baremetal/tasks/install.yml

@@ -150,7 +150,7 @@
     name: "{{ (ubuntu_pkg_removals | join(' ')).split() }}"
     state: absent
   become: True
-  when: ansible_distribution|lower == "ubuntu"
+  when: ansible_os_family == 'Debian'
 
 - name: Remove packages
   package:

releasenotes/notes/bug-1933122-b34311ba73092080.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes host bootstrap on Debian not removing the conflicting packages.
+    It now behaves in accordance with the docs.
+    `LP#1933122 <https://launchpad.net/bugs/1933122>`__