Use finally in run_bulk_job

While there is separate handling for `except` and `else` of a `try`
block, they don't seem to be doing anything significantly different. So
just use a `finally` statement instead and drop `except` and `else`.

Author: jakirkham

drmaa/helpers.py

@@ -288,10 +288,7 @@ def run_bulk_job(jt, start, end, incr=1):
         while drmaa_get_next_job_id(jids.contents, jid,
                                     _BUFLEN) != NO_MORE_ELEMENTS:
             yield jid.value.decode()
-    except:
-        drmaa_release_job_ids(jids.contents)
-        raise
-    else:
+    finally:
         drmaa_release_job_ids(jids.contents)