Update HA docs to point to 1.5 branch
Update HA docs to point to 1.5 branch

Change harbor sql to point to 1.5.0 branch.
change keepalived configuration file and check script to 1.5.0 branch

steven-zou/harbor,reasonerjt/harbor,wy65701436/harbor,wy65701436/harbor,steven-zou/harbor,wy65701436/harbor,wy65701436/harbor,steven-zou/harbor,reasonerjt/harbor,steven-zou/harbor,steven-zou/harbor,wy65701436/harbor,reasonerjt/harbor,reasonerjt/harbor,reasonerjt/harbor,reasonerjt/harbor,steven-zou/harbor,wy65701436/harbor