Switch to using default gke-cluster oauthScopes

Verified that we can change oauthScope nodePool settings to
gke-defaults. Tests test-e2e, metrics and logs works as before.

build/gke-test-cluster/cluster-e2e.yml

@@ -28,10 +28,12 @@ resources:
             tags:
               - game-server
             oauthScopes:
-              - https://www.googleapis.com/auth/compute
               - https://www.googleapis.com/auth/devstorage.read_only
               - https://www.googleapis.com/auth/logging.write
               - https://www.googleapis.com/auth/monitoring
+              - https://www.googleapis.com/auth/service.management.readonly
+              - https://www.googleapis.com/auth/servicecontrol
+              - https://www.googleapis.com/auth/trace.append
 - name: game-server-firewall
   type: compute.beta.firewall
   properties:

build/gke-test-cluster/cluster.yml.jinja

@@ -30,19 +30,23 @@ resources:
             tags:
               - game-server
             oauthScopes:
-              - https://www.googleapis.com/auth/compute
               - https://www.googleapis.com/auth/devstorage.read_only
               - https://www.googleapis.com/auth/logging.write
               - https://www.googleapis.com/auth/monitoring
+              - https://www.googleapis.com/auth/service.management.readonly
+              - https://www.googleapis.com/auth/servicecontrol
+              - https://www.googleapis.com/auth/trace.append
         - name: "agones-system"
           initialNodeCount: 1
           config:
             machineType: n1-standard-4
             oauthScopes:
-              - https://www.googleapis.com/auth/compute
               - https://www.googleapis.com/auth/devstorage.read_only
               - https://www.googleapis.com/auth/logging.write
               - https://www.googleapis.com/auth/monitoring
+              - https://www.googleapis.com/auth/service.management.readonly
+              - https://www.googleapis.com/auth/servicecontrol
+              - https://www.googleapis.com/auth/trace.append
             labels:
               stable.agones.dev/agones-system: "true"
             taints:
@@ -54,10 +58,12 @@ resources:
           config:
             machineType: n1-standard-4
             oauthScopes:
-              - https://www.googleapis.com/auth/compute
               - https://www.googleapis.com/auth/devstorage.read_only
               - https://www.googleapis.com/auth/logging.write
               - https://www.googleapis.com/auth/monitoring
+              - https://www.googleapis.com/auth/service.management.readonly
+              - https://www.googleapis.com/auth/servicecontrol
+              - https://www.googleapis.com/auth/trace.append
             labels:
               stable.agones.dev/agones-metrics: "true"
             taints:

site/content/en/docs/Installation/_index.md

@@ -80,7 +80,7 @@ gcloud container clusters create [CLUSTER_NAME] --cluster-version=1.11 \
   --tags=game-server \
   --enable-basic-auth \
   --password=supersecretpassword \
-  --scopes=https://www.googleapis.com/auth/devstorage.read_only,compute-rw,cloud-platform \
+  --scopes=gke-default \
   --num-nodes=3 \
   --machine-type=n1-standard-1
 ```