1. Add List dispaly Params 'brand' and List filter Params 'brand' for
GuestTemplate and ScalingGroup.
2. ScalingActivity's list elem should be sorted in order by StartTime and EndTime
3. HealthCheckCycle and HealthCheckGov in ScalingGroup work now
4. Detach all ScalingGroup when pending delete Guest
5. If the scaling behavior of the scaling group fails n(n is 3 for now) times consecutively,
the controller will automatically disablet this group
6. Timer will trigger ScalingPolicy throught request but func call
1. Add status 'creating' for ScalingPolicy.
2. Do nothing when call ScalingGroup.Scale when ScalingGroup is disable.
3. Change the obj about GuestDetachScalingGroupTask from Guest to
ScalingGroup.
4. Fix some problem about ScalingTimer and add test for its Update func.
5. Fix problem when ScalingTimer work in controller.
1. ScalingPolicy's CoolingTime will limit ScalingPolicy with 'alarm' TriggerType
2. Health Check will remove instance that has been shut down for 3 minutes.
3. If TargetNumer > SG.MaxInstanceNumber or TargetNumber < SG.MinInstanceNumber,
ScalingActivity's status will be set to 'part_success'.
4. When you want to increase the DesireInstanceNumber that has reached the maximum value,
or decrease the this that has reached the minimum value, the ScalingActivity is rejected.
5. ScalingPolicy.PostCreate and PostDelete asynchronous execution.
