Fix: Add TC root url for management command where missing

treeherder/etl/management/commands/ingest_push_and_tasks.py

@@ -8,6 +8,7 @@ from django.conf import settings
 from django.core.management.base import BaseCommand
 
 from treeherder.etl.job_loader import JobLoader
+from treeherder.etl.push_loader import PushLoader
 from treeherder.etl.pushlog import HgPushlogProcess
 from treeherder.etl.taskcluster_pulse.handler import (EXCHANGE_EVENT_MAP,
                                                       handleMessage)