In order to keep up with changes to the Jitsi Videobridge component, we have to upgrade OF 3.9.2 bouncy castle libraries from 1.49 to 1.50.
Modified CertificateManager.java to use PEMParser instead of deprecated PEMReader
Reference: http://stackoverflow.com/questions/14919048/bouncy-castle-pemreader-pemparser
Modified versions.txt to update bouncycastle jar file versions
Modified build.xml to exclude bouncycastle jar files from pack200