Redundant default parameter value assignment warning shouldn't appear if target is a string

[dragove]

In this case

class A {
  String name;
}

@Mapping(target="name", defaultValue="")
A cloneA(A s);

the string after defaultValue shows redundant warning. In this case, it stands for empty string if s.name is null.

[filiphr]

This is a tricky one. We need to investigate if we can override the IntelliJ redundant warning, because for MapStruct there is a difference.

[filiphr]

Since IntelliJ 2021.2 there is an extension point called DefaultAnnotationParamInspection.IgnoreAnnotationParamSupport, which allows us to instruct IntelliJ to ignore the "Redundant default parameter assignment" warning. We are going to bump our minimum supported IntelliJ to 2021.2 in order to use the new extension point.