Tolerate empty LaunchConfigurationName
Tolerate empty LaunchConfigurationName

Ass seen in issue #589, sometimes an AutoScalingGroup will not have a
LaunchConfigurationName.  This should not be possible, AFAICT, but we
can still recover from it - we will simply try to set the correct
LaunchConfiguration.

Issue #589

sp-borja-juncosa/kops,DualSpark/kops,tsupertramp/kops,tsupertramp/kops,andrewsykim/kops,andrewsykim/kops,ikropotov/kops,tsupertramp/kops,aledbf/kops,MadDogTechnology/kops,sethpollack/kops,reactiveops/kops,sp-borja-juncosa/kops,reactiveops/kops,mad01/kops,sp-borja-juncosa/kops,gambol99/kops,leandrocr/kops,ikropotov/kops,blakebarnett/kops,MadDogTechnology/kops,kubernetes/kops,kris-nova/kops,gambol99/kops,robinpercy/kops,robinpercy/kops,faraazkhan/kops,aledbf/kops,chrislovecnm/kops,MadDogTechnology/kops,blakebarnett/kops,chrislovecnm/kops,faraazkhan/kops,WillemMali/kops,justinsb/kops,pdh/kops,mad01/kops,zytek/kops,reactiveops/kops,chrislovecnm/kops,WillemMali/kops,leandrocr/kops,zytek/kops,faraazkhan/kops,austinmoore-/kops,BradErz/kops,dacohen/kops,BradErz/kops,pdh/kops,aledbf/kops,ikropotov/kops,gambol99/kops,kris-nova/kops,WillemMali/kops,DualSpark/kops,sp-borja-juncosa/kops,chrislovecnm/kops,andrewsykim/kops,austinmoore-/kops,blakebarnett/kops,DualSpark/kops,reactiveops/kops,dacohen/kops,luomiao/kops,austinmoore-/kops,sethpollack/kops,aledbf/kops,sethpollack/kops,kris-nova/kops,mad01/kops,WillemMali/kops,austinmoore-/kops,mad01/kops,BradErz/kops,gambol99/kops,faraazkhan/kops,pdh/kops,kubernetes/kops,zytek/kops,luomiao/kops,justinsb/kops,luomiao/kops,pdh/kops,dacohen/kops,kubernetes/kops,kris-nova/kops,MadDogTechnology/kops,leandrocr/kops,leandrocr/kops,sethpollack/kops,ikropotov/kops,andrewsykim/kops,luomiao/kops,BradErz/kops,dacohen/kops,robinpercy/kops,DualSpark/kops,tsupertramp/kops,blakebarnett/kops,robinpercy/kops,zytek/kops,justinsb/kops