add session exam number to job description

bootstrap.py

@@ -110,6 +110,7 @@ def jobsinit(args):
             '_id': counter,
             'group': project.get('group_id'),
             'project': project.get('_id'),
+            'exam': session.get('exam'),
             'app_id': 'scitran/dmc2nii:latest',
             'inputs': [
                 {

util.py

@@ -178,6 +178,7 @@ def create_job(db, dataset):
                     '_id': db.jobs.count() + 1,
                     'group': project.get('group_id'),
                     'project': project.get('_id'),
+                    'exam': session.get('exam'),
                     'app_id': app_id,
                     'inputs': [
                         {