R163 - Bug Fixes for Coding Simulators

Below are the fixes in Hack that have gone live as a part of the R163 release.

1. R Simulator - Grading fix - Grading used to fail for candidates in case they used to generate plots by running test cases in spite of the plots getting generated and uploaded, making it a critical issue for sustained usage of this simulator.

2. R-Simulator - Display exact compiler version to candidates: R simulator now has the ability to extract and display the exact compiler version available to a candidate for a particular question.

3. Mean Stack Simulator - Wildcard certificate inclusion: We have shifted from “subpath” based URLs to “subdomain” based URLs in the MEAN stack simulator. This makes it much easier to add and display resources like images to the pages in the MEAN projects.