修改定期任务的Runnable实现，使之能够返回是否完成并接受错误

Signed-off-by: ghuazh <ghuazh@gmail.com>
Merge branch 'master' of https://github.com/sgewuhan/pm.git


Signed-off-by: ghuazh <ghuazh@gmail.com>


Signed-off-by: ghuazh <ghuazh@gmail.com>
Merge branch 'master' of https://github.com/sgewuhan/pm.git

Conflicts:
	com.sg.business.model/src/com/sg/business/model/Project.java

Signed-off-by: ghuazh <ghuazh@gmail.com>