1. Add Clair should be default scanner in upgrade test;
2. Add tag retention verification in upgrade test;
3. Add tag retention verification in upgrade test;
4. Add tag Immutability verification in upgrade test;
5. Add webhook verification in upgrade test;
6. Add CVE whitelist in upgrade test;
Signed-off-by: Danfeng Liu (c) <danfengl@vmware.com>
