Description of problem:

Sriov operator cannot restore the default policy in CR sriovnetworknodepolicy if it was deleted.

Version-Release number of selected component (if applicable):
quay.io/openshift-release-dev/ocp-v4.0-art-dev:v4.2.0-201908051019-ose-sriov-network-operator

How reproducible:
always

Steps to Reproduce:
1. Install sriov operator
2. Delete the default policy in sriovnetworknodepolicy from webconsole
3. found all ds are deleted in sriov namepaces
4. wait the sriov operator to restore default policy
5. check the logs of operator
Actual results:
4. sriov operator cannot restore default policy
5. 
   {"level":"info","ts":1565156966.3371418,"logger":"controller_caconfig","msg":"Reconciling CA config map","Request.Namespace":"sriov-network-operator","Request.Name":"sriov-network-operator-lock"}
{"level":"info","ts":1565157387.1095076,"logger":"controller_sriovnetworknodepolicy","msg":"Reconciling SriovNetworkNodePolicy","Request.Namespace":"sriov-network-operator","Request.Name":"default"}
{"level":"error","ts":1565157387.109652,"logger":"kubebuilder.controller","msg":"Reconciler error","controller":"sriovnetworknodepolicy-controller","request":"sriov-network-operator/default","error":"SriovNetworkNodePolicy.sriovnetwork.openshift.io \"default\" not found","stacktrace":"github.com/openshift/sriov-network-operator/vendor/github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/github.com/go-logr/zapr/zapr.go:128\ngithub.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:217\ngithub.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func1\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:158\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.JitterUntil.func1\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:133\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.JitterUntil\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:134\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.Until\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:88"}
{"level":"info","ts":1565157387.3210003,"logger":"controller_caconfig","msg":"Reconciling CA config map","Request.Namespace":"sriov-network-operator","Request.Name":"openshift-service-ca"}
{"level":"error","ts":1565157387.3210638,"logger":"controller_caconfig","msg":"Couldn't get caBundle ConfigMap","Request.Namespace":"sriov-network-operator","Request.Name":"openshift-service-ca","error":"ConfigMap \"openshift-service-ca\" not found","stacktrace":"github.com/openshift/sriov-network-operator/vendor/github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/github.com/go-logr/zapr/zapr.go:128\ngithub.com/openshift/sriov-network-operator/pkg/controller/caconfig.(*ReconcileCAConfigMap).Reconcile\n\t/go/src/github.com/openshift/sriov-network-operator/pkg/controller/caconfig/caconfig_controller.go:81\ngithub.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:215\ngithub.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func1\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:158\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.JitterUntil.func1\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:133\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.JitterUntil\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:134\ngithub.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait.Until\n\t/go/src/github.com/openshift/sriov-network-operator/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:88"

Expected results:

sriov operator can restore default policy and work well 

Additional info: