Adjust inventory computed field calculations to happen in the celery context

awx/api/serializers.py

@@ -755,6 +755,7 @@ class HostSerializer(BaseSerializerWithVariables):
             d['last_job']['job_template_name'] = obj.last_job.job_template.name
         except (KeyError, AttributeError):
             pass
+        # TODO: This is slow
         d['all_groups'] = [{'id': g.id, 'name': g.name} for g in obj.all_groups.all()]
         d['groups'] = [{'id': g.id, 'name': g.name} for g in obj.groups.all()]
         d['recent_jobs'] = [{'id': j.job.id, 'name': j.job.job_template.name, 'status': j.job.status, 'finished': j.job.finished} \

awx/api/views.py

@@ -38,7 +38,6 @@ from awx.main.task_engine import TaskSerializer
 from awx.main.models import *
 from awx.main.utils import *
 from awx.main.access import get_user_queryset
-from awx.main.signals import ignore_inventory_computed_fields, ignore_inventory_group_removal
 from awx.api.authentication import JobTaskAuthentication
 from awx.api.permissions import *
 from awx.api.renderers import *