Add test for http_direct dl

tasks/RedHat-register.yml

@@ -14,6 +14,7 @@
       changed_when: false
       notify: remove agent
       tags: cmk_register
+  when: cmk_add_host
   rescue:
     - name: Gather facts of packages
       package_facts:
@@ -23,7 +24,7 @@
     - name: Check if dnf package manager is installed
       command: which dnf
       register: dnf_check
-      ignore_errors: yes
+      ignore_errors: true
 
     - name: Ensure check_mk_agent installed (again) with dnf
       package: