Fix job recovery and savepoint bug

[elanv]

• Job recovery bug
  When job manager fails and job state falls to Lost, job is not properly recovered.
  The job is resubmitted, but the previous job ID is not cleared, so it is considered an unexpected job and is canceled.

• Savepoint bug
  Savepoint is not triggered properly.

Resolves #398

[elanv]

@shashken @functicons
I have also fixed the issue #392 (comment) because savepoint is required for this PR.

[shashken]

@elanv good job, @functicons this needs to be approved quickly, the version on master does not take SP.
I haven't done a complete test after I pushed CR changes and that line: error != nil broken

[morelina]

I am using the commit in this PR and I am having issues when updating the job: #408

[functicons]

/gcbrun

[functicons]

Thanks for the fix!

[pgandhijr]

I am experiencing this bug where when the job manager fails the task is submitted but it fails because it is using a a old job id. I am using tag v1beta-9. Is there an older stable version that is not affected by this bug that we could use?