Merge pull request #12010 from edx/ormsbee/measure_login_page

Add finished() metric for login and registration.

lms/templates/student_account/login_and_register.html

@@ -13,6 +13,14 @@
     <%static:require_module module_name="js/student_account/logistration_factory" class_name="LogistrationFactory">
         var options = ${data | n, dump_js_escaped_json};
         LogistrationFactory(options);
+        if ('newrelic' in window) {
+            newrelic.finished();
+            // Because of a New Relic bug, the finished() event doesn't show up
+            // in Insights, so we have to make a new PageAction that is basically
+            // the same thing. We still want newrelic.finished() for session
+            // traces though.
+            newrelic.addPageAction('xfinished');
+        }
     </%static:require_module>
 </%block>