deploy: add memory limits

This is the beginning of a change to add cpu/memory limits to our pods.
We are doing this because some consumers require this, and it is generally
a good practice.

The limits == requests for "Guaranteed" QoS.

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

deploy/concierge/deployment.yaml

@@ -102,6 +102,8 @@ spec:
           resources:
             requests:
               memory: "128Mi"
+            limits:
+              memory: "128Mi"
           args:
             - --config=/etc/config/pinniped.yaml
             - --downward-api-path=/etc/podinfo

deploy/supervisor/deployment.yaml

@@ -81,6 +81,8 @@ spec:
           resources:
             requests:
               memory: "128Mi"
+            limits:
+              memory: "128Mi"
           volumeMounts:
             - name: config-volume
               mountPath: /etc/config