Added the possibility to list items by specifying query parameters (used

for direct query on Slr via Ckan package_search API)

src/main/java/org/gcube/gcat/client/Item.java

@@ -34,6 +34,11 @@ public class Item extends GCatClient implements org.gcube.gcat.api.interfaces.It
 		Map<String, String> queryParams = new HashMap<>();
 		queryParams.put(GCatConstants.LIMIT_PARAMETER, String.valueOf(limit));
 		queryParams.put(GCatConstants.OFFSET_PARAMETER, String.valueOf(offset));
+		return this.list(queryParams);
+	}
+	
+	
+	public String list(Map<String,String> queryParams) throws WebApplicationException {
 		return super.list(queryParams);
 	}
 	
@@ -45,7 +50,7 @@ public class Item extends GCatClient implements org.gcube.gcat.api.interfaces.It
 		Map<String, String> queryParams = new HashMap<>();
 		queryParams.put(GCatConstants.LIMIT_PARAMETER, String.valueOf(limit));
 		queryParams.put(GCatConstants.OFFSET_PARAMETER, String.valueOf(offset));
-		queryParams.put(GCatConstants.ORGANIZATION_PARAMETER, organizationName);
+		queryParams.put(GCatConstants.Q_KEY, String.format(GCatConstants.ORGANIZATION_FILTER_TEMPLATE, organizationName));
 		return super.list(queryParams);
 	}