Add replica and anti-affinity to rbd-provisioner

The rbd-provisioner does not follow the same template as the other
openstack-helm charts so we need to use specific methods to set the
affinity and replica parameters.

Story: 2004520
Task: 29845
Change-Id: I05b97b8254a541753031ba051707092eae301d6a
Signed-off-by: David Sullivan <david.sullivan@windriver.com>

stx-platform-helm/stx-platform-helm/helm-charts/rbd-provisioner/templates/deployment.yaml

@@ -24,6 +24,16 @@ spec:
     {{- if (.Values.global.rbac) or (.Values.global.reuseRbac)}}
       serviceAccount: {{ .Values.rbac.serviceAccount }}
     {{- end }}
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+          - labelSelector:
+              matchExpressions:
+              - key: app
+                operator: In
+                values:
+                - {{ .Values.global.name }}
+            topologyKey: kubernetes.io/hostname
       containers:
       - name: {{ .Values.global.name }}
         image: {{ .Values.images.tags.rbd_provisioner | quote }}