KT-3542 Can't navigate to property implementation

#KT-3542 Fixed

idea/testData/navigation/implementations/multifile/ImplementVarInJava/ImplementVarInJava.java

@@ -0,0 +1,11 @@
+package testing.jj;
+
+public class JavaBase extends testing.kt.KotlinBase {
+    @Override
+    public String getSome() {
+    }
+
+    @Override
+    public void setSome(String someValue) {
+    }
+}

idea/testData/navigation/implementations/multifile/ImplementVarInJava/ImplementVarInJava.kt

@@ -0,0 +1,8 @@
+package testing.kt
+
+open class KotlinBase {
+  open var <caret>some = "Test"
+}
+
+// REF: (in testing.jj.JavaBase).getSome()
+// REF: (in testing.jj.JavaBase).setSome(String)