v1.0.0-beta.3

change logs:

newfeature: flyway support,when system upgraded, the corresponding SQL is upgraded automatically without manual execution
newfeature: Real time tracking records the latest checkpoints of the task. The number of checkpoints reserved in the database is consistent with the configuration state.checkpoints.num-retained of Flink, which will be provided automatically when starting next time
newfeature: If the task fails, send alarm mail and restart automatically (optional)
bug fix: about get task state missing bug fixed
bug fix: get flink default config (flink-conf.yaml) bug fixed
bug fix: get yarn web address bug fix.
bug fix: appname check exists bug fix.
bug fix: Solve the problem of restart all the time