nfs-client: missing namespace for RoleBinding

[curx]

if nfs-client is deployed via kubectl without helm and install in another namespace as default, the nfs-client will not be functional and at the logs will be filled with errors:

Reproduce:

kubectl create namespace nfs-client
sed -i'' "s/namespace:.*/namespace: nfs-client/g" ./deploy/rbac.yaml ./deploy/deployment.yaml
kubectl create -f deploy/rbac.yaml -f deploy/deployment.yaml
kubectl --namespace nfs-client logs -l app=nfs-client-provisioner

E0207 18:06:51.880561       1 leaderelection.go:234] error retrieving resource lock nfs-client/fuseim.pri-ifs: endpoints "fuseim.pri-ifs" is forbidden: User "system:serviceaccount:nfs-client:nfs-client-provisioner" cannot get resource "endpoints" in API group "" in the namespace "nfs-client"
E0207 18:06:55.236994       1 leaderelection.go:234] error retrieving resource lock nfs-client/fuseim.pri-ifs: endpoints "fuseim.pri-ifs" is forbidden: User "system:serviceaccount:nfs-client:nfs-client-provisioner" cannot get resource "endpoints" in API group "" in the namespace "nfs-client"
...