fix reports: add missing Q import

Author: valentijnscholten

dojo/reports/views.py

@@ -14,6 +14,7 @@
 from django.http import HttpResponse
 from django.shortcuts import render, get_object_or_404
 from django.utils import timezone
+from django.db.models import Q
 
 from dojo.celery import app
 from dojo.endpoint.views import get_endpoint_ids