[Optimization-640][Alert,web] Optimization all Alert of sendMsg 

[Optimization-641][admin] Optimize job instance api

[Feature-635][admin] Add job instance info api

[Optimization-633][web] Optimization lineage refresh

[hotfix][web] ClusterConfiguration page hotfix

[Fix-629] [core] Fix lineage of the same field name cannot be correct…

[Optimization-627][web] Optimization page Form  

[Feature-609][metadata] Supports generating FlinkSQL with null and no…

fix #608 Can't create a flink table when table name is a sql reserved…

[Fix][core]: setParentId() 方法判空错误

[Fix-621] [core] Fix can't explain 'show datatbases'

[Optimization][client] explainSqlRecord 方法优化

Update deploy.md

[fix-607][dlink-alert-email] fix ClassNotFoundException: javax.mail.Address

修改错别字

[Fix-140][core] Fix 'table.local-time-zone' parameter is invalid

[Optimization-605][web] fix The alias is empty in several places

[Fix-603] [admin] Task information will be cleared when refreshing ta…

[Fix-596][admin] Fix NPE on running yarn per-job app