Adding extra precondition for replicas and antiAffinity

[Spedoske]

The test will fail because there are 5 replicas, and the podAntiAffinity enforce that there is at most 1 pod on each node. We need to add precondition to check if such situation happened.

apiVersion: rabbitmq.com/v1beta1
kind: RabbitmqCluster
metadata:
  name: test-cluster
  namespace: rabbitmq-system
spec:
  affinity:
    podAffinity:
      requiredDuringSchedulingIgnoredDuringExecution: null
    podAntiAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchExpressions:
          - key: app.kubernetes.io/name
            operator: In
            values:
            - test-cluster
        topologyKey: kubernetes.io/hostname
  image: null
  imagePullSecrets: null
  override:
    statefulSet:
      spec:
        template:
          spec:
            containers: []
            ephemeralContainers:
            - name: p
              resources:
                requests:
                  hugepages-2Mi: 1000m
  persistence:
    storage: 50Gi
  rabbitmq:
    additionalConfig: 'cluster_partition_handling = pause_minority

      vm_memory_high_watermark_paging_ratio = 0.99

      disk_free_limit.relative = 1.0

      collect_statistics_interval = 10000

      '
  replicas: 5
  resources:
    limits:
      cpu: 1
      memory: 4Gi
    requests:
      cpu: 1
      memory: 4Gi
  secretBackend: null
  service:
    type: ClusterIP
  skipPostDeploySteps: false
  terminationGracePeriodSeconds: 1024
  tls:
    caSecretName: null
    disableNonTLSListeners: false
    secretName: null
  tolerations: null