Update for buster

ad-auth/tasks/sssd.yml

@@ -48,7 +48,7 @@
       apt:
         name: python-pexpect
         state: present
-      when: debian_version == "stretch"
+      when: debian_version != "jessie"
       tags:
         - sssd
 
@@ -58,7 +58,7 @@
         responses:
           # yamllint disable-line rule:line-length
           "Passwor(d|t) for Administrator.*": "{{ lookup('passwordstore', ad_admin_password) }}"
-      when: debian_version == "stretch"
+      when: debian_version != "jessie"
       no_log: true
       tags:
         - sssd