Added @ExpectLoadErrors annotations to test data.

Also, fixed syntax error in AddNullabilitySameJavaType.

compiler/testData/loadJava/kotlinSignature/error/SyntaxErrorInFieldAnnotation.java

@@ -1,10 +1,10 @@
 package test;
 
 import jet.runtime.typeinfo.KotlinSignature;
-
-import java.lang.String;
+import org.jetbrains.jet.jvm.compiler.annotation.ExpectLoadError;
 
 public class SyntaxErrorInFieldAnnotation {
+    @ExpectLoadError("Alternative signature has syntax error at 10: Type expected")
     @KotlinSignature("var foo : ")
     public String foo;
 }