JS: prevent compiler from importing module more than once if not necessary. See KT-15260

js/js.translator/testData/box/jsModule/importCountCommonJS.js

@@ -0,0 +1,12 @@
+__beginModule__();
+module.exports = function(param) {
+    switch (typeof param) {
+        case "number":
+            return "a";
+        case "string":
+            return "b";
+        default:
+            return "c";
+    }
+};
+__endModule__("lib");