…ver States Allocated, Ready, or Reserved

Follows fleet.yaml example in github issue googleforgames#2716
status: # ... usual fleet status values
 counters: # aggregate counter values
   rooms:
     total: 43 # total of count values for key rooms
     capacity: 100 # total capacity count in all GameServers across the fleet rooms key
 lists: # aggregate list values
   players:
     count: 58 # total number of list items in all GameServers across the Fleet under player key
     capacity: 200 # total capacity count in all GameServers across the Fleet player key
   frogs:
     count: 12
     capacity: 88