Merge branch 'feature-groupActive' into 'DEV'

创建group，默认激活状态







See merge request !437

mooctest-site-server/src/main/java/cn/iselab/mooctest/site/service/impl/GroupServiceImpl.java

@@ -75,6 +75,7 @@ public class GroupServiceImpl implements GroupService {
         group.setManagerId(managerId);
         group.setName(name);
         group.setInformation(null);
+        group.setIsActive(true);
         groupDao.save(group);
         return group;
     }