JS: move expressions test to box tests

js/js.translator/testData/box/expression/dollarParameter/dollarParameter.kt

@@ -0,0 +1,10 @@
+package foo
+
+fun MyController(`$scope`: String): String {
+    return "Hello " + `$scope` + "!"
+}
+
+fun box(): String {
+    assertEquals("Hello world!", MyController("world"))
+    return "OK"
+}