Slurm, fix submitting tasks multiple times

submit_helper writes an invalid state to _task_info_cache,
and then task_state returns STATE_UNKNOWN,
which causes STATE_INTERRUPTED_RESUMABLE,
which causes a resubmit.

Fix #163

sisyphus/simple_linux_utility_for_resource_management_engine.py

@@ -259,7 +259,7 @@ def submit_helper(self, call, logpath, rqmt, name, task_name, start_id, end_id,
 
                 logging.info("Submitted with job_id: %s %s" % (job_id, name))
                 for task_id in range(start_id, end_id, step_size):
-                    self._task_info_cache[(name, task_id)].append((job_id, "PD"))
+                    self._task_info_cache[(name, task_id)].append((job_id, "PENDING"))
 
                 if err:
                     logging.warning(f"Got error while submitting job (but job {job_id} was submitted)")