Skip invalid files without URI
Store finished jobs on workflow job
JobPojo: finishedJobs is now an array not a set
JobService allows posting jobs by URI (for persisting non JobService-local jobs)
WorkflowExecutionService Job interaction
* add finished jobs to job as soon as they're finished
* Set completeLog property after workflow is done
* Persist workflow job when workflow is done (/job/byURI)
Merge branch 'speedup' of github.com:DM2E/dm2e-ws into speedup

Conflicts:
	src/main/java/eu/dm2e/ws/services/workflow/WorkflowExecutionService.java