[DAB RBAC] Re-implement system auditor as a singleton role in new system (#14963)

* Add new enablement settings from DAB RBAC

* Initial implementation of system auditor as role without testing

* Fix system auditor role, remove duplicate assignments

* Make the system auditor role managed

* Flake8 fix

* Remove another thing from old solution

* Fix a few test failures

* Add extra setting to disable custom system roles via API

* Add test for custom role prohibition

awx/api/generics.py

@@ -971,7 +971,6 @@ class CopyAPIView(GenericAPIView):
             None, None, self.model, obj, request.user, create_kwargs=create_kwargs, copy_name=serializer.validated_data.get('name', '')
         )
         if hasattr(new_obj, 'admin_role') and request.user not in new_obj.admin_role.members.all():
-            new_obj.admin_role.members.add(request.user)
             give_creator_permissions(request.user, new_obj)
         if sub_objs:
             permission_check_func = None

awx/api/serializers.py

@@ -3142,7 +3142,6 @@ class CredentialSerializerCreate(CredentialSerializer):
         credential = super(CredentialSerializerCreate, self).create(validated_data)
 
         if user:
-            credential.admin_role.members.add(user)
             give_creator_permissions(user, credential)
         if team:
             if not credential.organization or team.organization.id != credential.organization.id:

awx/api/views/__init__.py

@@ -90,7 +90,7 @@ from awx.api.generics import (
 from awx.api.views.labels import LabelSubListCreateAttachDetachView
 from awx.api.versioning import reverse
 from awx.main import models
-from awx.main.models.rbac import give_creator_permissions, get_role_definition
+from awx.main.models.rbac import get_role_definition
 from awx.main.utils import (
     camelcase_to_underscore,
     extract_ansible_vars,
@@ -2314,14 +2314,6 @@ class JobTemplateList(ListCreateAPIView):
     serializer_class = serializers.JobTemplateSerializer
     always_allow_superuser = False
 
-    def post(self, request, *args, **kwargs):
-        ret = super(JobTemplateList, self).post(request, *args, **kwargs)
-        if ret.status_code == 201:
-            job_template = models.JobTemplate.objects.get(id=ret.data['id'])
-            job_template.admin_role.members.add(request.user)
-            give_creator_permissions(request.user, job_template)
-        return ret
-
 
 class JobTemplateDetail(RelatedJobsPreventDeleteMixin, RetrieveUpdateDestroyAPIView):
     model = models.JobTemplate