tests: store: test relative path error handling
tests: store: test relative path error handling

Signed-off-by: Loic Dachary <b6eae37fc74638590e3f9030895d42446505d41b@dachary.org>

heartsucker/securedrop,garrettr/securedrop,micahflee/securedrop,conorsch/securedrop,ehartsuyker/securedrop,garrettr/securedrop,garrettr/securedrop,conorsch/securedrop,garrettr/securedrop,heartsucker/securedrop,micahflee/securedrop,ageis/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,micahflee/securedrop,ageis/securedrop,ehartsuyker/securedrop,micahflee/securedrop,ageis/securedrop,heartsucker/securedrop,ageis/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop