Don't crash if timed out layers have been delted.
Don't crash if timed out layers have been delted.

We have a check for timed out jobs, but in some cases these can get stale,
especially testing. If the layer associated with a job timeout message is not
found, we should not crash. Here we catch the exception and move on.

aaronxsu/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,kdeloach/raster-foundry,kdeloach/raster-foundry,aaronxsu/raster-foundry,raster-foundry/raster-foundry