Project: mesos
Issue MESOS-5054: Namespace the stout flags
A recent name collision occurred when updating the 3rdparty http-parser library: https://github.com/apache/mesos/commit/94df63f72146501872a06c6487e94bdfd0f23025 We should put stout's {{flags}} namespace within another suitable namespace (perhaps {{stout::flags}}) to avoid such collisions.
Story points: 2