Fix qt5/tests.xml
Fix tst_qmailstore after config defaults change

Either broken (1) since f274471 ([libqmfclient] Modify
.provider/.service to be less generic) which renamed
GenericEmail.service to email.service so it affects the default
QMailAccountConfiguration now, or (2) already since 9d5d7d6 (Accounts-qt
integration).
Merge pull request #13 from martyone/fix-tests

Fix tests