magento#12342: JSTestDriver removal

- Added tabs.test.js and removed JsTestDriver equivalent.

Author: omiroshnichenko

dev/tests/js/JsTestDriver/testsuite/mage/tabs/index.html

@@ -0,0 +1,8 @@
+<div id="tabs">
+    <div id="title1" data-role="collapsible">
+    </div>
+    <div id="content1" data-role="content"></div>
+    <div id="title2" data-role="collapsible">
+    </div>
+    <div id="content2" data-role="content"></div>
+</div>