`ACCEPT_CASE_INSENSITIVE_PROPERTIES` fails with `@JsonUnwrapped`

[cowtowncoder]

(note: moved from FasterXML/jackson-dataformat-csv#133)

When trying to deserialize type like:

public class Person {
  @JsonUnwrapped(prefix = "businessAddress.")
  public Address businessAddress;
}

public class Address {
  public String street;
  public String addon;
  public String zip = "";
  public String town;    
  public String country;
}

with case-insensitive mapper (mapper.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES);) I get exception:

java.util.NoSuchElementException: No entry 'businessAddress' found, can't remove
	at com.fasterxml.jackson.databind.deser.impl.BeanPropertyMap.remove(BeanPropertyMap.java:447)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:534)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:293)
   ...