An existing v2alpha5 CR, with AddressSettingType.items.spec.addressSettings.addressSetting.redeliveryDelayMultiplier  configured will contain a float, which we cannot coerce into  a string.

W1019 05:36:52.854120 1 reflector.go:324] sigs.k8s.io/controller-runtime/pkg/cache/internal/informers_map.go:250: failed to list *v1beta1.ActiveMQArtemis: json: cannot unmarshal number into Go struct field AddressSettingType.items.spec.addressSettings.addressSetting.redeliveryDelayMultiplier of type string E1019 05:36:52.854187 1 reflector.go:138] sigs.k8s.io/controller-runtime/pkg/cache/internal/informers_map.go:250: Failed to watch *v1beta1.ActiveMQArtemis: failed to list *v1beta1.ActiveMQArtemis: json: cannot unmarshal number into Go struct field AddressSettingType.items.spec.addressSettings.addressSetting.redeliveryDelayMultiplier of type string W1019 05:36:54.248420 1 reflector.go:324] sigs.k8s.io/controller-runtime/pkg/cache/internal/informers_map.go:250: failed to list *v1beta1.ActiveMQArtemis: json: cannot unmarshal number into Go struct field AddressSettingType.items.spec.addressSettings.addressSetting.redeliveryDelayMultiplier of type string