Three of the four tests fail if `settings.allowAnyoneToImport` is
false. The fourth ("tries to import Plain Text to a pad that does not
exist") isn't particularly useful when `settings.allowAnyoneToImport`
is false: That test tests an import failure mode, and when
`settings.allowAnyoneToImport` is false the failure could be caused by
that instead of the expected cause.
Just final bits of test coverage for import/export of LibreOffice. It turns out Travis by default installs an old LO that doesn't support PDF import. To remedy that I use the LO PPA and also strict install the PDF import support.
Still to do in a future date is check LO exported contents includes expected strings, for now it just checks output length looks sane.
