Fix protocol field during connection copy

Author: Kevin D Smith

swat/cas/connection.py

@@ -218,6 +218,7 @@ def __init__(self, hostname=None, port=None, username=None, password=None,
         prototype = kwargs.get('prototype')
         if prototype is not None:
             soptions = prototype._soptions
+            protocol = prototype._protocol
 
         else:
             # Get connection parameters from config