Always get host from event data

* Regardless of if there is a host map or not, get the host that Ansible
  reports and assign it to the Events' host_name

awx/main/tasks/callback.py

@@ -95,7 +95,7 @@ class RunnerCallback:
         if self.parent_workflow_job_id:
             event_data['workflow_job_id'] = self.parent_workflow_job_id
         event_data['job_created'] = self.job_created
-        if self.host_map:
+
         host = event_data.get('event_data', {}).get('host', '').strip()
         if host:
             event_data['host_name'] = host