UserReport is not core

Author: dcramer

src/sentry/models/userreport.py

@@ -14,6 +14,8 @@
 
 
 class UserReport(Model):
+    __core__ = False
+
     project = FlexibleForeignKey('sentry.Project')
     group = FlexibleForeignKey('sentry.Group', null=True)
     event_id = models.CharField(max_length=32)