update data.gov CSW endpoint to https

Author: tomkralidis

python/plugins/MetaSearch/resources/connections-default.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Guidance: https://hub.qgis.org/wiki/quantum-gis/MetaSearch_Default_Connections_List -->
 <qgsCSWConnections version="1.0">
-    <csw name="USA: Data.gov CSW" url="http://catalog.data.gov/csw-all"/>
+    <csw name="USA: Data.gov CSW" url="https://catalog.data.gov/csw-all"/>
     <csw name="Danmark: National CSW" url="http://www.geodata-info.dk/registrant/srv/en/csw"/>
     <csw name="Finland: National CSW (Paikkatietohakemisto)" url="http://www.paikkatietohakemisto.fi/geonetwork/srv/fi/csw"/>
     <csw name="Greece: Geodata.gov.gr CSW" url="http://geodata.gov.gr/csw"/>