Tests for obsolete KT-5232: vfy error with default parameter in method of trait

#KT-5232 Obsolete

compiler/testData/codegen/box/defaultArguments/function/kt5232.kt

@@ -0,0 +1,14 @@
+trait A {
+    fun visit(a:String, b:String="") : String = b + a
+}
+
+class B : A {
+    override fun visit(a:String, b:String) : String = b + a
+}
+
+fun box(): String {
+    val result = B().visit("K", "O")
+    if (result != "OK") return "fail $result"
+
+    return B().visit("OK")
+}