Before this change, TestIntegration/FsName could fail with "slice bounds out of
range [:-1]" when run with -remotes local.
It also caused issues with
'^TestGitAnnexFstestBackendCases$/^(TransferStorePathWithInteriorWhitespace|TransferStoreRelative)$'.
This change fixes the issue by accepting either "" or "local" to indicate the
local remote.
nielash
d9fbbba5c3