Description of problem:
Create egreenetworkpolicy with the following json:

----------denyall.json-----

{
"kind": "EgressNetworkPolicy",
"apiVersion": "v1",
"metadata": {
"name": "policy1"
},
"spec": {
"egress": [
{
"type": "Deny",
"to": {
"cidrSelector": "0.0.0.0/0"
}
}
]
}
}

-------------------------------

when using above json, the following errors shown:
 ' validation failure list:
spec.egress.to.cidrSelector in body should match '^(([0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])/([1-9]|[12][0-9]|3[0-2])$'




Version-Release number of selected component (if applicable):
payload: 4.0.0-0.nightly-2019-01-25-214846

How reproducible:
always

Steps to Reproduce:
1. using the above json to create one egressnetworkpolicy
2. oc create -f denyall.json
3.

Actual results:

The EgressNetworkPolicy "policy1" is invalid: []: Invalid value: map[string]interface {}{"spec":map[string]interface {}{"egress":[]interface {}{map[string]interface {}{"type":"Deny", "to":map[string]interface {}{"cidrSelector":"0.0.0.0/0"}}}}, "apiVersion":"network.openshift.io/v1", "kind":"EgressNetworkPolicy", "metadata":map[string]interface {}{"name":"policy1", "namespace":"z1", "creationTimestamp":"2019-01-28T10:18:42Z", "generation":1, "uid":"16af18e6-22e6-11e9-9918-024f1dbae570", "selfLink":"", "clusterName":""}}: validation failure list:
spec.egress.to.cidrSelector in body should match '^(([0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])/([1-9]|[12][0-9]|3[0-2])$'

Expected results:

the egressnetworkpolicy can be created.
0.0.0.0/0 should can be matched.

Additional info: