Fix CA-secret mount in gerrit replica init job

Change-Id: I30908a530b7c4de904826ccb81f431c9ac1a722c
diff --git a/helm-charts/gerrit-replica/templates/git-repositories-init.job.yaml b/helm-charts/gerrit-replica/templates/git-repositories-init.job.yaml
index 72c92e6..650bd7f 100644
--- a/helm-charts/gerrit-replica/templates/git-repositories-init.job.yaml
+++ b/helm-charts/gerrit-replica/templates/git-repositories-init.job.yaml
@@ -122,9 +122,11 @@
       - name: gerrit-config
         configMap:
           name: {{ .Release.Name }}-gerrit-replica-configmap
+      {{ if .Values.caCert -}}
       - name: tls-ca
         secret:
           secretName: {{ .Release.Name }}-tls-ca
+      {{- end }}
       {{- if .Values.nfsWorkaround.enabled }}
       - name: nfs-config
         configMap: