Added an explicit set_many() check that the exception is related.

In ``set_many()`` we catch a TypeError to see if the *settle_time*
parameter is accepted by each signal's ``set()`` method, and if it is
we try again without the *settle_time* argument. If a TypeError is
raised for another reason, this would also retry the ``set()``
call. We can't guarantee that this is indempotent. Now we explicity
check that the TypeError is at least related to the *settle_time*
argument before retrying.

pcdsdevices/utils.py

@@ -554,9 +554,12 @@ def set_many(
         try:
             try:
                 st = signal.set(value, timeout=timeout, settle_time=settle_time)
-            except TypeError:
-                # It's probably a Positioner, which doesn't accept *settle_time*
-                st = signal.set(value, timeout=timeout)
+            except TypeError as exc:
+                if "settle_time" in str(exc):
+                    # It's probably a Positioner, which doesn't accept *settle_time*
+                    st = signal.set(value, timeout=timeout)
+                else:
+                    raise
         except Exception:
             log.exception("Failed to set %s to %s", signal.name, value)
             if raise_on_set_failure: