This makes unit tests faster with Camel.
End users can override the isLazyLoadingTypeConverter method from CamelTestSupport if they want to control the behavior.
If you return false, then its what it used to be before this change.
Notice that Camel will still by default always load all type converters on startup.
By enabling lazy loading during testing it allows most unit tests to run faster, in case they dont need any additional type converter from other camel components.