fix: check for command return codes to control behaviour

tasks/remove_packages.yml

@@ -6,6 +6,12 @@
       #command: systemctl list-unit-files | grep clam
       command: systemctl list-unit-files clamav-daemon.service clamav-freshclam.service
       register: check_clamav_installed
+      failed_when:
+        - ( "0 unit files listed." not in check_clamav_installed.stdout )
+        - ( check_clamav_installed.rc != 0 )
+      changed_when:
+        - ( "0 unit files listed." not in check_clamav_installed.stdout )
+        - ( check_clamav_installed.rc != 0 )
     - name: clamav Deinstallation
       block:
         - name: clamav systemd Services deaktivieren
@@ -27,4 +33,4 @@
             purge: true
             autoremove: yes
       when:
-        - ( "0 unit files listed." not in check_clamav_installed.stdout )
+        - ( "0 unit files listed." not in check_clamav_installed.stdout )
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