Added the create sg from lc checkbox option on the step 4 of the launch config wizard
Set the default checked value for the step4 page to be identical to the default of the step 3 page
Use ng-model for the two checkbox input fields instead
Merge pull request #862 from eucalyptus/GUI-978

Gui 978 Add the Create SG from LC checkbox input option on the step 4 page of the launch config wizard