move status table updates for various tables together in scale out

TODO: this reveals a possible bug here that FAILED entries in simulated status are not immedaitely sent, but instead only get sent
at the next poller update? unless submitted entries which are sent immediately? that should be an easy fix after this PR, though...

Author: benclifford

parsl/executors/status_handling.py

@@ -184,23 +184,27 @@ def scale_out_facade(self, n: int) -> List[str]:
         if not self.provider:
             raise ScalingFailed(self, "No execution provider available")
         block_ids = []
+        monitoring_status_changes = {}
         logger.info(f"Scaling out by {n} blocks")
         for _ in range(n):
             block_id = str(self._block_id_counter.get_id())
             logger.info(f"Allocated block ID {block_id}")
             try:
                 job_id = self._launch_block(block_id)
+
+                pending_status = JobStatus(JobState.PENDING)
+
                 self.blocks_to_job_id[block_id] = job_id
                 self.job_ids_to_block[job_id] = block_id
+                self._status[block_id] = pending_status
+
+                monitoring_status_changes[block_id] = pending_status
                 block_ids.append(block_id)
+
             except Exception as ex:
                 self._simulated_status[block_id] = JobStatus(JobState.FAILED, "Failed to start block {}: {}".format(block_id, ex))
 
-        new_status = {}
-        for block_id in block_ids:
-            new_status[block_id] = JobStatus(JobState.PENDING)
-        self.send_monitoring_info(new_status)
-        self._status.update(new_status)
+        self.send_monitoring_info(monitoring_status_changes)
         return block_ids
 
     def scale_in(self, blocks: int) -> List[str]: