Description of problem:
In an ose-3.2 env, router service is created during installation, when try to deploy router again, the second attempt is failing with error message:
I0229 22:07:59.524961       1 deployer.go:201] Deploying from default/router-1 to default/router-3 (replicas: 1)
I0229 22:08:00.634903       1 rolling.go:228] RollingUpdater: Continuing update with existing controller router-3.
F0229 22:08:00.634955       1 deployer.go:69] one of maxSurge or maxUnavailable must be specified

Version-Release number of selected component (if applicable):
openshift v3.1.1.908
kubernetes v1.2.0-alpha.7-703-gbc4550d
etcd 2.2.5


How reproducible:
Always

Steps to Reproduce:
1.[root@openshift-137 ~]# oc get pod
NAME                      READY     STATUS    RESTARTS   AGE
router-1-f2d9z            1/1       Running   0          3m
[root@openshift-137 ~]# oc get dc router -o yaml
...
spec:
  replicas: 1
  selector:
    router: router
  strategy:
    resources: {}
    rollingParams:
      intervalSeconds: 1
      maxSurge: 0
      maxUnavailable: 25%
      timeoutSeconds: 600
      updatePercent: -25
      updatePeriodSeconds: 1
    type: Rolling
...

2. [root@openshift-137 ~]# oc deploy router --latest
Started deployment #2
[root@openshift-137 ~]# oc get pod
NAME                      READY     STATUS    RESTARTS   AGE
router-1-f2d9z            1/1       Running   0          6m
router-2-deploy           0/1       Error     0          10s
[root@openshift-137 ~]# oc logs router-2-deploy
I0229 21:59:01.994987       1 deployer.go:201] Deploying from default/router-1 to default/router-2 (replicas: 1)
I0229 21:59:03.100406       1 rolling.go:228] RollingUpdater: Continuing update with existing controller router-2.
F0229 21:59:03.138800       1 deployer.go:69] one of maxSurge or maxUnavailable must be specified
[root@openshift-137 ~]# oc get rc
CONTROLLER          CONTAINER(S)   IMAGE(S)                                                               SELECTOR                                                                                REPLICAS   AGE
router-1            router         registry.x.x.com/openshift3/ose-haproxy-router:v3.1.1.908    deployment=router-1,deploymentconfig=router,router=router                               1          14m
router-2            router         registry.x.x.com/openshift3/ose-haproxy-router:v3.1.1.908    deployment=router-2,deploymentconfig=router,router=router                               0          1m


Actual results:


Expected results:
The redeployment should be successful

Additional info: