Commented the dns import error. Tried to import dnspython and did not work, so we choose to hide the error.
Commented the dns import error. Tried to import dnspython and did not work, so we choose to hide the error.

git-svn-id: eb1f1cc1c85a2360c7c4a73c360b88a184bcc8ce@2196 afeded8d-2dbf-ebe2-555a-a28d15d75c70

exic/spade2,exic/spade2,exic/spade2