Translatable pages cleanup
I have some suggestions about translatable pages:
- Stop translating all test news, for the same reasons why alpha, beta and rc test news are already untranslatable (short translation window, test reports should be in English, sometimes not translated).
-Stop translating security/Numerous_security_holes_in_*
-Rename usability_testing_2014_05, report_end_of_2014 and bounties_2013_report
Feature Branch: xin:feature/16361-translatable-pages-cleanup