Add sleep after shutting down hppcorbaserver in ServerManager
Add sleep after shutting down hppcorbaserver in ServerManager

Co-authored-by: Joseph Mirabel <c794dc978753694c40f4d5fd4b8c12595a76e068@gmail.com>
humanoid-path-planner/hpp-corbaserver,humanoid-path-planner/hpp-corbaserver