DCworms

Checkpointing module fixes

Fixed multiple handleJob calls when failing multiple tasks from the same job.
Fixed invalid checkpointing event cancelation when some of the jobs tasks are finished.
Fixed cancelation filter for the RESUME event.
Added missing updates in DCwormsResSchema.
Recreated catching resource and scheduler events by ErrorGenerationComponents.
Changed data object in PAUSE, RESUME and MIGRATE events to contain exec task instead of ids.
Merged MIGRATE and MOVE events to fix the migration time logic.