[release-4.13] new whereabouts reconciler relies on HOSTNAME which != spec.nodeName

[akaris@linux whereabouts-clusterbot]$ oc rsh -n openshift-multus whereabouts-reconciler-nq49z
sh-4.4# env | grep NAME
HOSTNAME=ip-10-0-252-190
OPENSHIFT_BUILD_NAME=multus-whereabouts-ipam-cni
OPENSHIFT_BUILD_NAMESPACE=ci-ln-d4sindb-1

[akaris@linux whereabouts-clusterbot]$ oc get pods -n openshift-multus whereabouts-reconciler-nq49z -o yaml | grep nodeName
  nodeName: ip-10-0-252-190.us-west-2.compute.internal

whereabouts-cni/cmd/controlloop/controlloop.go
  135     ipPoolInformerFactory := wbinformers.NewSharedInformerFactory(wbClientSet, noResyncPeriod)                          
  136     netAttachDefInformerFactory := nadinformers.NewSharedInformerFactory(nadK8sClientSet, noResyncPeriod)               
  137     podInformerFactory := v1coreinformerfactory.NewSharedInformerFactoryWithOptions(                                    
  138         k8sClientSet, noResyncPeriod, v1coreinformerfactory.WithTweakListOptions(                                       
  139             func(options *v1.ListOptions) {                                                                             
  140                 const (                                                                                                 
  141                     filterKey           = "spec.nodeName"                                                               
  142                     hostnameEnvVariable = "HOSTNAME"                                                                    
  143                 )                                                                                                       
  144                 options.FieldSelector = fields.OneTermEqualSelector(filterKey, os.Getenv(hostnameEnvVariable)).String() 
  145             }))