1. Fix issue of keyword Go Into Repo, the verification logic could be more strict;
2. Add API E2E pytest of GC with untag flag enabled;
3. Add sleep in test_user_view_logs.py for delete log ocurred;
4. Test Case - Tag CRUD is not stable. Although add button was clicked, but the tag was'nt added successfully.

Signed-off-by: danfengliu <danfengl@vmware.com>