1. Local image should be removed, otherwise docker 20 will not tigger
get manifest request to harbor;
2. E2E image Dockerfile update;
3. Fix nighlty test issue of tag retention, add execution refesh to get
result;
4. Fix nighlty test keyword 'Create An New Project And Go Into
Project' issue that waiting long enough time for list display;
5. Add nightly test case, in GUI, scan result will show if cve id exist in allow list configuration;
6. Move proxy cache test to schdule pipeline, it will save some time for
db pipeline.
Signed-off-by: danfengliu <danfengl@vmware.com>
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