Access Control List missing many layers if there is only one problematic layer

[smesdaghi]

When user is not logged into GeoNode the access control list is used to present them with the list of layers they should be able to see. when executing:
python manage.py update layers --ignore-errors
if there are in fact any errors, (we had an error where it could not resolve the style of a particular layer) update layers continues however, the ACL will be partial. We removed the layer that had the error and re-ran updatelayers which corrected the partial ACL.

[jj0hns0n]

@smesdaghi is there a way to reliably replicate this one?

[jj0hns0n]

@smesdaghi lets test this on the single layer that failed using the new filters for updatelayers in GeoNode#925 ... we should be able to isolate the problem this way and try to debug this.

[smesdaghi]

okay, I am on an older build. As soon as we get the latest build setup, we can test. thanks.

[jj0hns0n]

@smesdaghi any update on this one? I believe it shoudl be fixed or we can use the filter.

[garnertb]

This crept up last week. The _thumbnail_url method was failing in the save process (due to special characters) and layer.set_default_permissions() was never run.