Add feature files that were missing in the reference GBE environment for GCP

Author: bgandon

gcp-env/features/enable-vbox-port-forwarding.yml

@@ -0,0 +1,31 @@
+---
+
+# Only NAT (not NATNet) allows us to expose ports to the internet.
+# See: <https://forums.virtualbox.org/viewtopic.php?f=7&t=82039#p386722>
+#
+# The problem is that when Virtulbox is running as a standard non-root Linux
+# user (which is our use-case for the moment), then ports below 1024 cannot be
+# bound using this 'nat' network feature.
+
+- type: replace
+  path: /networks/-
+  value:
+    name: vbox-port-forwarding-network
+    type: manual
+    subnets:
+      - range:   10.0.2.0/24     # has to be 10.0.x.0/24
+        gateway: 10.0.2.2        # has to end with .2
+        dns:     ["10.0.2.3"]    # has to end with .3
+        static:
+          - 10.0.2.4
+        cloud_properties:
+          type: nat
+
+- type: replace
+  path: /instance_groups/name=bosh/networks/name=default/default?
+  value: [dns, gateway]
+
+- type: replace
+  path: /instance_groups/name=bosh/networks/-
+  value:
+    name: vbox-port-forwarding-network

gcp-env/features/resurrector-config.yml

@@ -0,0 +1,8 @@
+---
+
+- path: /instance_groups/name=bosh/properties/hm/resurrector?
+  type: replace
+  value:
+    minimum_down_jobs: 5    # > above this threshold, meltdown is declared
+    percent_threshold: 0.2  # above 20%, meltdown is declared
+    time_threshold: 600     # time period for calulating meltdown thresholds