Global Map instead of Layer Map for some imported gpkg files.

[JivanAmara]

When importing layers from some gpkg files the map which is shown in the UI is a global map of the world instead of a map matching the bounding box of the layer.

The layer created in geoserver at: https://github.com/GeoNode/django-osgeo-importer/blob/master/osgeo_importer/handlers/geoserver/__init__.py#L167 has bad bounding limits for layers from the file which shows the problem; this is probably why the map is global.

san_diego_downtown_generic-osm-data-20161202.gpkg: Shows problem
tiger_roads.gpkg: No Problem
portauprince.fixedcolnames.gpkg: No problem; has multiple layers & rtrees like problem gpkg.

example_gpkgs.zip