1. Add manifest and CNAB replication tests;
2. Duplicate ORAS and sigularity tests from API test to nightly common
tests;
3. Optimize get dns code in CI;
4. Optimize E2E dockerfile;
5. Sample image size should be cover requirement for large size like 512M.
Signed-off-by: danfengliu <danfengl@vmware.com>
Change source of most of test image samples from docker-hub to local building ones, so it will cost less docker-hub pull requests.
And some of cases like push cnab, they have to use docker-hub, but image samples in cnab test will cost 17 quotas, in this PR, we
replace those samples, now cnab case will cost 6 quotas.
Signed-off-by: danfengliu <danfengl@vmware.com>
Due to docker-hub pull request rate limitation, we will use registed account to pull image
from docker-hub, therefore add docker-hub login in API tests.
Signed-off-by: danfengliu <danfengl@vmware.com>
