Correct reraising of exception

When an exception was caught and rethrown, it should call 'raise'
without any arguments because it shows the place where an exception
occured initially instead of place where the exception re-raised.

Change-Id: I4c0dd68a00be1cc8b33f0e886678fdc14d13dc21

sahara/service/api/v11.py

@@ -132,7 +132,7 @@ def execute_job(job_id, data):
             LOG.error(_LE("Can't run job execution. "
                           "(Reasons: {reason})").format(reason=e))
             conductor.job_execution_destroy(context.ctx(), job_execution)
-            raise e
+            raise
 
     api.OPS.run_edp_job(job_execution.id)