Fixed assertion + refactored code making it more simple

j2k/tests/testData/ast/typeParameters/rawTypeCast.java

@@ -0,0 +1,8 @@
+import java.util.*;
+
+class A {
+    public static Map<String, String> foo() {
+        Properties props = new Properties();
+        return new HashMap<>((Map)props);
+    }
+}

j2k/tests/testData/ast/typeParameters/rawTypeCast.kt

@@ -0,0 +1,11 @@
+import java.util.*
+import kotlin.Map
+
+class A {
+    class object {
+        public fun foo(): Map<String, String> {
+            val props = Properties()
+            return HashMap(props as Map<Any, Any>)
+        }
+    }
+}