[quota management] Create test for quota exceeding k8 quota

[KPostOffice]

If requested quota is greater than k8 quota, the AppWrapper should successfully schedule, but no pods should be created due to k8 enforced limits.

Files used:

k8-tiny-quota.yaml

apiVersion: v1
kind: ResourceQuota
metadata:
  name: example
  namespace: test1
spec:
  hard:
    requests.cpu: '1m'
    requests.memory: 1Mi
    limits.cpu: '1m'
    limits.memory: 1Mi

---

testing-forest.yaml

apiVersion: ibm.com/v1
kind: QuotaSubtree
metadata:
  name: context-root
  namespace: kube-system
  labels:
    tree: quota_context
spec:
  children:
    - name: context-root
      quotas:
        hardLimit: true
        requests:
          cpu: 2000
          memory: 8000Mi
---
apiVersion: ibm.com/v1
kind: QuotaSubtree
metadata:
  name: context-root-children
  namespace: kube-system
  labels:
    tree: quota_context
spec:
  parent: context-root
  children:
    - name: alpha
      quotas:
        hardLimit: false
        requests:
          cpu: 1000
          memory: 4000Mi
    - name: beta
      quotas:
        requests:
          cpu: 1000
          memory: 4000Mi

---

exceeed-k8-quota.yaml

apiVersion: mcad.ibm.com/v1beta1
kind: AppWrapper
metadata:
  name: fail-for-k8
  namespace: test1
  labels:
    quota_context: "alpha"
spec:
  service:
    spec: {}
  resources:
    metadata: {}
    GenericItems:
      - metadata: {}
        replicas: 1
        custompodresources:
        - replicas:  1
          requests:
            cpu: 500m
            memory: 2000Mi
          limits:
            cpu: 500m
            memory: 2000Mi
        generictemplate:
          apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
          kind: StatefulSet
          metadata:
            name: fail-for-k8
            namespace: test1
            labels:
              app: fail-for-k8
          spec:
            selector:
              matchLabels:
                app: fail-for-k8
            replicas: 1
            template:
              metadata:
                labels:
                  app: fail-for-k8
                  size: "1"
              spec:
                containers:
                  - name: fail-for-k8
                    image: registry.access.redhat.com/ubi8/ubi:latest
                    command:
                      - /bin/sh
                      - -c
                      - while true; do sleep 10; done
                    resources:
                      requests:
                        cpu: "500m"
                        memory: "2000Mi"
                      limits:
                        cpu: "500m"
                        memory: "2000Mi"

Expect

An event indicating that a pod cannot be scheduled due to resource limits being exceeded, i.e.:

create Pod fail-for-k8-0 in StatefulSet fail-for-k8 failed error: pods "fail-for-k8-0" is forbidden: exceeded
quota: example, requested: limits.cpu=500m,limits.memory=2000Mi,requests.cpu=500m,requests.memory=2000Mi,
used: limits.cpu=0,limits.memory=0,requests.cpu=0,requests.memory=0,
limited: limits.cpu=1m,limits.memory=1Mi,requests.cpu=1m,requests.memory=1Mi

[KPostOffice]

#359