Change assert to raise LDAPUnwillingToPerform, so trial todo handling works.
Change assert to raise LDAPUnwillingToPerform, so trial todo handling works.

git-svn-id: 554337001ebd49d78cdf0a90d762fa547a80d337@399 373aa48d-36e5-0310-bb30-ae74d9883905

antong/ldaptor,antong/ldaptor