Fix the jobLevel, fileSet and Client into Copy/Migrate-job

Fix the jobLevel, fileSet and Client into Copy/Migrate-job

- Use the FileSet, and the Client from the Job Record instead of the Job
  resource.
- Use the JobLevel from the JobRecord, it was wrongly set to copy-job Level
  in "Fix bug #2286 copied jobs always have level=Incremental"
- These values can all be overwritten in the command line or by the
  Scheduler, that is why they must be taken from the Job Record.
- Notice that values copied into wjcr goes into the volume and then
  a bscan of the copy should restore the right value into the catalog