Merge pull request #20860 from owncloud/use-user-getEMailAddress-all-over-the-place

apps/encryption/lib/crypto/encryptall.php

apps/provisioning_api/lib/users.php

apps/provisioning_api/tests/userstest.php

core/ajax/share.php

core/lostpassword/controller/lostcontroller.php

lib/private/ocs/cloud.php

lib/private/share/mailnotifications.php

lib/private/user/user.php

lib/public/il10n.php

settings/controller/userscontroller.php

settings/personal.php

tests/core/lostpassword/controller/lostcontrollertest.php

tests/lib/share/MailNotificationsTest.php

tests/settings/controller/userscontrollertest.php