Fix unit test test_import_record_with_verify

The test case test_import_record_with_verify is intended to call a
backup service class with a defined verify function. This verify
function wasn't overloaded by the fake service.

Change-Id: Ib5738e9c463856dd71a47717b7abb8dff785b3b1
Closes-bug: #1350699
Merge "Fix unit test test_import_record_with_verify"