upup: use JSON as fallback in --dryrun printing
upup: use JSON as fallback in --dryrun printing

Rather than giving up with an error, we can simply use JSON format.

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