libopenstorage has added a new feature that makes it possible to destroy
the contents of a key/value in the Hashicorp Vault kv-v2 secrets backend.
See-also: https://github.com/libopenstorage/secrets/pull/55
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Uses github.com/libopenstorage/secrets to communicate with Vault. This
removes the need for maintaining our own limited Vault APIs.
By adding the new dependency, several other packages got updated in the
process. Unused indirect dependencies have been removed from go.mod.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
