[ipa/server] Add KRA role to replicas as well

This should prevent error during backup:

```
Error: Local roles CA do not match globally used roles CA, KRA. A backup done on this host would not be complete enough to restore a fully functional, identical cluster.
```

Signed-off-by: Michal Konecny <mkonecny@redhat.com>

roles/ipa/server/tasks/main.yml

@@ -147,6 +147,7 @@
   - name: deploy replica
     command: ipa-replica-install
              --setup-ca
+             --setup-kra
              --admin-password={{ipa_admin_password}}
              --no-host-dns
              --mkhomedir