J2K: Detect @NotNull fields

j2k/src/org/jetbrains/jet/j2k/Converter.java

@@ -361,7 +361,7 @@ public class Converter {
         return new Field(
                 new IdentifierImpl(field.getName()), // TODO
                 modifiers,
-                typeToType(field.getType()),
+                typeToType(field.getType(), ConverterUtil.isAnnotatedAsNotNull(field.getModifierList())),
                 createSureCallOnlyForChain(field.getInitializer(), field.getType()), // TODO: add modifiers
                 countWritingAccesses(field, psiClass)
         );

j2k/tests/testData/ast/annotations/file/jetbrainsNotNull.kt

@@ -1,6 +1,6 @@
 package test
 public open class Test(str : String) {
-var myStr : String? = "String2"
+var myStr : String = "String2"
 public open fun sout(str : String) : Unit {
 System.out?.println(str)
 }