树结构，将同级的member，push到children中

期望

将member中的数据当成chilren来遍历，为了适应于element的树结构组件

初始数据结构

 list: [
        {
          children: [
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [],
              org_id: 493,
              org_title: '特效',
              parent_id: 482,
              person_num: 0
            },
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [{ avatar: '', real_name: '调色大师', user_id: 713 }],
              org_id: 494,
              org_title: '调色',
              parent_id: 482,
              person_num: 1
            },
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [{ avatar: '', real_name: '声音大师', user_id: 714 }],
              org_id: 495,
              org_title: '声音',
              parent_id: 482,
              person_num: 1
            },
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [{ avatar: '', real_name: 'IO大师', user_id: 715 }],
              org_id: 496,
              org_title: 'IO',
              parent_id: 482,
              person_num: 1
            },
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [{ avatar: '', real_name: '组长', user_id: 716 }],
              org_id: 497,
              org_title: '组长家',
              parent_id: 482,
              person_num: 1
            },
            {
              children: [],
              is_default: 0,
              level: 1,
              member: [{ avatar: '', real_name: '总监', user_id: 717 }],
              org_id: 498,
              org_title: '总监家',
              parent_id: 482,
              person_num: 1
            }
          ],
          is_default: 1,
          level: 0,
          member: [],
          org_id: 482,
          org_title: '17611641003的团队',
          parent_id: 0,
          person_num: 0
        }
      ]