Add memory request to pinniped deployment

- We are not setting an upper limit because Kubernetes might randomly
  decide to unschedule our pod in ways that we can't anticipate in
  advance, causing very hard to reproduce production bugs.
- We noticed that our app currently uses ~30 MB of memory when idle,
  and ~35 MB of memory under some load. So a memory request of 128
  MB should be reasonable.

Signed-off-by: Andrew Keesler <akeesler@vmware.com>

deploy/deployment.yaml

@@ -50,7 +50,6 @@ data:
   .dockerconfigjson: #@ data.values.image_pull_dockerconfigjson
 #@ end
 ---
-#! TODO set resource minimums (e.g. 512MB RAM) to make sure we get scheduled onto a reasonable node?
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -83,6 +82,9 @@ spec:
           image: #@ data.values.image_repo + ":" + data.values.image_tag
           #@ end
           imagePullPolicy: IfNotPresent
+          resources:
+            requests:
+              memory: "128Mi"
           args:
             - --config=/etc/config/pinniped.yaml
             - --downward-api-path=/etc/podinfo