Sanitize uploaded layers that start with a numeric character

[giohappy]

Geoserver layers starting with a numeric character will throw an error when accessed as GML through WFS. This prevents loading these layers from third-party applications that request WFS data as GML (e.g. QGIS).

The importer will prefix the name of these layers with an underscore ("_") character.

[mattiagiupponi]

NOTE: the fix should be put here

geonode/geonode/upload/handlers/base.py

Lines 186 to 207 in 993364a

	def fixup_name(self, name):
	"""
	Emulate the LAUNDER option in ogr2ogr which will normalize the string.
	This is enriched with additional transformation for parentesis.
	The basic normalized function can be found here
	https://github.com/OSGeo/gdal/blob/0fc262675051b63f96c91ca920d27503655dfb7b/ogr/ogrsf_frmts/pgdump/ogrpgdumpdatasource.cpp#L130 # noqa
	We use replace because it looks to be one of the fasted options:
	https://stackoverflow.com/questions/3411771/best-way-to-replace-multiple-characters-in-a-string
	"""
	return (
	name.lower()
	.replace("-", "_")
	.replace(" ", "_")
	.replace("#", "_")
	.replace("\\", "_")
	.replace(".", "")
	.replace(")", "")
	.replace("(", "")
	.replace(",", "")
	.replace("&", "")[:62]
	)