upup: Fix fingerprint calculation in AWS keypair
upup: Fix fingerprint calculation in AWS keypair

Both fix the calculation itself to match AWS's weird fingerprint
algorithm, and also fix the comparison logic by which we infer that if
the fingerprint matches, that the public key matches also.

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