Fixed parameter being passed to assert_privilege call.

Added code to pass in different parameter to assert_privilege call depending upon where user is coming from as 'resolve' method is a common method. This method is called when user presses 'Simulation' subtab under Automate maintab and also when user presses 'Simulate' button for a custom button from Customization explorer.

https://bugzilla.redhat.com/show_bug.cgi?id=1146885
https://bugzilla.redhat.com/show_bug.cgi?id=1147081

@dclarizio please review/test.