bug fix : when a client timeout happens very early in the segmentation process,  a NullPointerException is thrown before the segmentation task is declared as done (subsequent tasks will stay in waiting state forever)
bug fix : When SegmentationJobRequest.getSegmentationIds() returns null, a NullPointerException were thrown.
refactoring : use the new TaskTemplate class representing good practices for a monitored segmentation task
Merge pull request #9 from codjo-sandbox/integration

2 bug fixes in segmentation process and monitoring refactoring
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