[hotfix] [dispatcher] Improve signature of #waitForTerminatingJobManager

[tisonkun]

What is the purpose of the change

#waitForTerminatingJobManager get a JobGraph, terminate the previous running future(if there was) and then apply a new action. The jobId should be always the same as jobGraph.getJobID(). We change the signature to improve understandability.

Brief change log

#waitForTerminatingJobManager(JobID, JobGraph, Function) → #waitForTerminatingJobManager(JobGraph, Function), and the JobID is now generated by JobGraph

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not applicable)

cc @tillrohrmann @StefanRRichter