Submit password/ssh_key/username through POST body
Submit password/ssh_key/username through POST body

Password or ssh_key, and username are currently submitted through the
request's querystring, which means they will appear in server logs.

This change moves the sensitive parameters to the request body, adds
client-side checking of the required parameters, and corrects the method
documentation to reflect addition of location_id parameter and specify
the parameter types as strings (they are alpha-numeric UUIDs).

unorthodoxgeek/fog,runtimerevolution/fog,martinb3/fog,petems/fog,joshmyers/fog,b0e/fog,SpryBTS/fog,phillbaker/fog,icco/fog,bryanl/fog,backupify/fog,nalabjp/fog,unorthodoxgeek/fog,nalabjp/fog,asebastian-r7/fog,b0ric/fog,duhast/fog,brilliomsinterop/fog,10io/fog,ManageIQ/fog,Programatica/fog,papedaniel/fog,brilliomsinterop/fog,pravi/fog,covario-cdiaz/fog,yyuu/fog,adamleff/fog,icco/fog,cocktail-io/fog,martinb3/fog,theforeman/fog,dtdream/fog,pyama86/fog,ack/fog,mitchlloyd/fog,MSOpenTech/fog,brilliomsinterop/fog,glennpratt/fog,runtimerevolution/fog,eLobato/fog,asebastian-r7/fog,sapcc/fog,Programatica/fog,brandondunne/fog,rackspace/fog,ManageIQ/fog,alphagov/fog,TerryHowe/fog,joshisa/fog,eLobato/fog,sideci-sample/sideci-sample-fog,adecarolis/fog,glennpratt/fog,sapcc/fog,lwander/fog,mavenlink/fog,covario-cdiaz/fog,mitchlloyd/fog,sferik/fog,NETWAYS/fog,alphagov/fog,sideci-sample/sideci-sample-fog,mavenlink/fog,Ladas/fog,dustacio/fog,kongslund/fog,dpowell7/fog,mohitsethi/fog,dhague/fog,surminus/fog,rackspace/fog,displague/fog,nicolasbrechet/fog,12spokes/fog,kongslund/fog,10io/fog,seanhandley/fog,nandhanurrevanth/fog,plribeiro3000/fog,backupify/fog,theforeman/fog,pravi/fog,fog/fog,adamleff/fog,b0ric/fog,displague/fog,surminus/fog,zephyrean/fog,cocktail-io/fog,ack/fog,SpryBTS/fog,seanhandley/fog,adecarolis/fog,lwander/fog,nandhanurrevanth/fog,joshmyers/fog,zephyrean/fog,mohitsethi/fog,bdunne/fog,TerryHowe/fog,phillbaker/fog,dtdream/fog,joshisa/fog,phillbaker/fog,github/fog,MSOpenTech/fog,petems/fog,duhast/fog,papedaniel/fog,nandhanurrevanth/fog,yyuu/fog,NETWAYS/fog,fog/fog,zephyrean/fog,Ladas/fog,dhague/fog,dLobatog/fog,pyama86/fog,nicolasbrechet/fog,dLobatog/fog,plribeiro3000/fog,dustacio/fog,github/fog,bryanl/fog