fix PFN use of os.join.path

ligo_rucio/rucio_data.py

@@ -92,7 +92,9 @@ def get_rse_pfn(rse_info, scope, name):
     if port != 0:
         url = url + ':' + str(port)
 
-    pfn = os.path.join(url, prefix, lfn2pfn_translator.path(scope=scope, name=name))
+    pfn = url + os.path.join(prefix, lfn2pfn_translator.path(scope=scope,
+                             name=name))
+
 
     return pfn