Adding corev1 scheme to Events

[johnugeorge]

One error log appears during the leader election at startup.

Could not construct reference to: '&v1.Endpoints{TypeMeta:v1.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:v1.ObjectMeta{Name:"tf-job-operator", GenerateName:"", Namespace:"default", SelfLink:"/api/v1/namespaces/default/endpoints/tf-job-operator", UID:"feb0f9ab-6e64-11e8-bdd9-42010aa00072", ResourceVersion:"18879593", Generation:0, CreationTimestamp:v1.Time{Time:time.Time{wall:0x0, ext:63664420868, loc:(*time.Location)(0x1b5df80)}}, DeletionTimestamp:(*v1.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string{"control-plane.alpha.kubernetes.io/leader":"{\"holderIdentity\":\"tf-job-operator-5864544fcb-d8c9m\",\"leaseDurationSeconds\":15,\"acquireTime\":\"2018-09-03T12:22:38Z\",\"renewTime\":\"2018-09-03T12:22:38Z\",\"leaderTransitions\":39}"}, OwnerReferences:[]v1.OwnerReference(nil), Initializers:(*v1.Initializers)(nil), Finalizers:[]string(nil), ClusterName:""}, Subsets:[]v1.EndpointSubset(nil)}' due to: 'no kind is registered for the type v1.Endpoints'. Will not report event: 'Normal' 'LeaderElection' '

This is because endpoints schema was not added during the initialization

---

This change is 

[TravisBuddy]

Travis tests have failed

Hey @johnugeorge,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

2nd Build

gometalinter --config=linter_config.json --vendor ./...

cmd/tf-operator.v2/app/server.go:130::warning: Errors unhandled.,LOW,HIGH (gosec)
cmd/tf-operator.v2/app/server.go:130:16:warning: error return value not checked (v1.AddToScheme(scheme.Scheme)) (errcheck)

3rd Build

gometalinter --config=linter_config.json --vendor ./...

cmd/tf-operator.v2/app/server.go:130::warning: Errors unhandled.,LOW,HIGH (gosec)
cmd/tf-operator.v2/app/server.go:130:16:warning: error return value not checked (v1.AddToScheme(scheme.Scheme)) (errcheck)

travis_time:end:14434c20:start=1536039608633548565,finish=1536039752901322845,duration=144267774280

[coveralls]

Coverage increased (+0.07%) to 56.932% when pulling 4a6795f on johnugeorge:log into ed91105 on kubeflow:master.

[coveralls]

Coverage increased (+0.07%) to 56.932% when pulling 7a86aae on johnugeorge:log into ed91105 on kubeflow:master.

[gaocegege]

/lgtm
/approve

[gaocegege]

/retest

[gaocegege]

/retest

[gaocegege]

/retest

[gaocegege]

/retest

[gaocegege]

/retest

[TravisBuddy]

Travis tests have failed

Hey @johnugeorge,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

2nd Build

gometalinter --config=linter_config.json --vendor ./...

cmd/tf-operator.v2/app/server.go:131:10:warning: unused variable or constant log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value (varcheck)
cmd/tf-operator.v2/app/server.go:131:10:warning: error return value not checked (log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value) (errcheck)
cmd/tf-operator.v2/app/server.go:131:10:warning: log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value (gosimple, staticcheck, unconvert)

travis_time:end:1b3d3a0b:start=1536041100422767121,finish=1536041169375503655,duration=68952736534

3rd Build

gometalinter --config=linter_config.json --vendor ./...

cmd/tf-operator.v2/app/server.go:131:10:warning: log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value (gosimple, staticcheck, unconvert)
cmd/tf-operator.v2/app/server.go:131:10:warning: error return value not checked (log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value) (errcheck)
cmd/tf-operator.v2/app/server.go:131:20:error: logrus.Errorf("CoreV1 Add Scheme failed: %v", err) used as value (vet)
cmd/tf-operator.v2/app/server.go:131:10:warning: unused variable or constant log.Errorf("CoreV1 Add Scheme failed: %v", err) (no value) used as value (varcheck)

travis_time:end:2326ab64:start=1536041063361630069,finish=1536041181583472996,duration=118221842927

[gaocegege]

/lgtm
/approve

[k8s-ci-robot]

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