* tests/openpgp/defs.scm (with-ephemeral-home-directory): Create
configuration files when we enter the context.
* tests/openpgp/setup.scm: Do not use an ephemeral home directory.
Tests should always use the cwd.
* tests/gpgsm/setup.scm: Likewise.
* tests/gpgsm/export.scm: Add explicit constructor function.
* tests/openpgp/decrypt-session-key.scm: Likewise.
* tests/openpgp/decrypt-unwrap-verify.scm: Likewise.
--
Previously, ephemeral homedirectories lacked a configuration, hence
GnuPG tried to start backend daemons using their installed locations.
Fix this by explicitly creating a suitable configuration.
GnuPG-bug-id: 3047
Signed-off-by: Justus Winter <justus@g10code.com>