Use Exception class' args instead of .message, which is deprecated in 2.6.
Use Exception class' args instead of .message, which is deprecated in 2.6.

git-svn-id: 353d90d4d8d13dcb4e0402680a9155a727f61a5a@895541 13f79535-47bb-0310-9956-ffa450edef68

cloudkick/libcloud,cloudkick/libcloud