Omit ctlPlaneIP if empty

It's possible that user provides `networkData` or `preprovisioningNetworkDataName`
that would have the network configuration to be used for the nodes
rather than what we configure with cloud-init.

Let's ignore if empty to avoid errors.

Signed-off-by: rabi <[email protected]>

api/v1beta1/openstackbaremetalset_types.go

@@ -30,7 +30,7 @@ type AutomatedCleaningMode string
 type InstanceSpec struct {
 	// +kubebuilder:validation:Optional
 	// CtlPlaneIP - Control Plane IP in CIDR notation
-	CtlPlaneIP string `json:"ctlPlaneIP"`
+	CtlPlaneIP string `json:"ctlPlaneIP,omitempty"`
 	// +kubebuilder:validation:Optional
 	// UserData - Host User Data
 	UserData *corev1.SecretReference `json:"userData,omitempty"`