Keystone: remove extra commas and tabs in JSON

The JSON doesn't parse correctly

Change-Id: Ie68ad1cdfb80b9f3c15e9d93476f7c53cc0a0858

docker/keystone/keystone.json

@@ -8,15 +8,13 @@
         "name": "keystone",
         "image": "kollaglue/fedora-rdo-keystone",
         "ports": [
-		{"containerPort": 5000},
-		{"containerPort": 35357},
+          {"containerPort": 5000},
+          {"containerPort": 35357}
         ],
-	"env": [
-		{"name": "DB_ROOT_PASSWORD",
-		"value": "password"},
-		{"name": "KEYSTONE_ADMIN_TOKEN",
-		"value": "ADMINTOKEN"},
-	]
+        "env": [
+          {"name": "DB_ROOT_PASSWORD", "value": "password"},
+          {"name": "KEYSTONE_ADMIN_TOKEN", "value": "ADMINTOKEN"}
+        ]
       }]
     }
   },