Added a function that waits for the instances to go into the shutdown state when deleting a scaling group
Adjusting the scaling group delete condition for AWS, which needs to wait until the instances are fully terminated
Adding the delete in progress icon while waiting
Separating the cases for AWS and euca for delete scalinggroup condition
Remving the icon tag for the idle dots
Pulled out the function wait_for_instances_to_shutdown() into DeleteScalingGroupMixin class
Adding a line in between the classes
Updating the delete scaling group URL
Swapping the route order between the scaling group view page and delete page
Merge pull request #400 from eucalyptus/GUI-472

Gui 472 Must wait until the instances are terminated in order to delete scaling group