GameServerSet Implementation

GameServerSets are the basic building block for Fleets.
GameServerSets will be allow Fleet migrations to occur, similarly
to how ReplicaSets allow Deployments to migrate one image type
to another.

This has not been formally documented, as this will likely be an
internal CRD, and not (widely) used externally.

Parent ticket: googleforgames#70

install/yaml/install.yaml

@@ -192,7 +192,7 @@ spec:
     - gs
     singular: gameserver
   validation:
-    openAPIV3Schema:      
+    openAPIV3Schema:
       required:
       - spec
       properties:
@@ -332,7 +332,7 @@ spec:
             replicas:
               type: integer
               minimum: 0
-            template:              
+            template:
               required:
               - spec
               properties:
@@ -507,7 +507,7 @@ spec:
           value: "false"
         # minimum port that can be exposed to GameServer traffic
         - name: MIN_PORT
-          value: "7000" 
+          value: "7000"
         # maximum port that can be exposed to GameServer traffic
         - name: MAX_PORT
           value: "8000"