Webservers with same app name in different namespaces should be allowed.

How to reproduce:
1. Install operator to be available in all namespaces (cluster-wide)
2. Create a webserver in the first namespace
apiVersion: web.servers.org/v1alpha1
kind: WebServer
metadata:
name: example-image-webserver
spec:

1. Add fields here
   applicationName: jws-app
   replicas: 2
   webImage:
   applicationImage: "registry-proxy.engineering.redhat.com/rh-osbs/jboss-webserver-6-jws61-openjdk17-rhel8-openshift:6.1.3-6"

3. Try to create webserver in the different namespace
apiVersion: web.servers.org/v1alpha1
kind: WebServer
metadata:
name: img-webserver
spec:

1. Add fields here
   applicationName: jws-app
   replicas: 2
   webImage:
   applicationImage: "registry-proxy.engineering.redhat.com/rh-osbs/jboss-webserver-6-jws61-openjdk17-rhel8-openshift:6.1.3-6"

Expected output: it should succeed