Currently in a build, several packages are built and at the end of it, all the failed test cases of all packages are extracted with the FAILED_TESTS macro.  Often, when sending the build failure email, the failures of other unrelated packages do not interest the owner of a specific package.  

In order to fetch the failed tests of a specific package, we can extend the functionality of FAILED_TESTS macro by adding an additional parameter to filter out tests of all the other packages.