- Run test with CONF: lombok.jacksonized.useJackson3 = true, adjust ecj tests.

- Validate config options.

test/transform/resource/before/JacksonizedBuilderComplex.java

@@ -1,5 +1,6 @@
 //version 8: Jackson deps are at least Java7+.
 //CONF: lombok.builder.className = Test*Name
+//CONF: lombok.jacksonized.useJackson3 = true
 import java.util.List;
 import lombok.Builder;
 import lombok.extern.jackson.Jacksonized;