LINAGENT-39: Fix killpg() call when the runtime is still running
LINAGENT-39: Fix killpg() call when the runtime is still running

git-svn-id: 663665d626adba95639dab686df0e13ce55f2fcc@17214 28e8926c-6b08-0410-baaa-805c5e19b8d6

ow2-proactive/agent-linux,ow2-proactive/agent-linux,ow2-proactive/agent-linux