Update automation test case "Delete Repo" (#6087)
Update automation test case "Delete Repo" (#6087)

Replace the "Sleep x seconds" with "Wait Until xxx" in the "Delete Repo" case

Signed-off-by: Wenkai Yin <f217e32b30716cdf38664c331b6ddefbd7f5cdf6@vmware.com>
steven-zou/harbor,wy65701436/harbor,steven-zou/harbor,steven-zou/harbor,wy65701436/harbor,reasonerjt/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,steven-zou/harbor,steven-zou/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,steven-zou/harbor,wy65701436/harbor,reasonerjt/harbor