TestCopySignatures, among other things, tests handling of a correctly
signed image to a different name without breaking the signature, which
will be impossible with schema1 after we start updating the names
embedded in the schema1 manifest. So, use the schema2 server binary,
and docker://busybox image versions which use schema2.
… testing signature reading and writing using the
X-Registry-Supports-Signatures extension, and its
interoperability/equivalence with the atomic: native OpenShift API.
This will make the output of godoc cleaner, we can't filter out the
subpackage otherwise.
Also copy the needed fixture into the integration subpackage, instead of
referring to it using ../signature/fixtures (and we can't import
signature/fixtures_info-test.go now).
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
