Allow skipping of validation of previous analysis results.

This allows the approach of:
1. Run analysis and check if there are any unknown inhibitors not already known and handled by remediation.
2. Go straight to upgrade which includes snapshot, remediation, upgrade, etc. without running analysis again.

This is fine because the leapp upgrade will stop anyways if there are still inhibitors remaining after remediation.

roles/upgrade/defaults/main.yml

@@ -50,4 +50,7 @@ os_path: $PATH
 
 async_timeout_maximum: 7200
 async_poll_interval: 60
+
+check_leapp_analysis_results: true
+
 ...

roles/upgrade/tasks/leapp-upgrade.yml

@@ -7,6 +7,7 @@
   ansible.builtin.assert:
     that: not upgrade_inhibited
     msg: Inhibitors found, please investigate and rerun analysis.
+  when: check_leapp_analysis_results
 
 - name: leapp-upgrade | Register to leapp activation key
   community.general.redhat_subscription: