SW-516: python3 fixes for ingestjobmanagementserver

LTA/LTAIngest/LTAIngestServer/LTAIngestAdminServer/lib/ingestjobmanagementserver.py

@@ -43,6 +43,7 @@ import time
 from random import random
 from threading import RLock
 from datetime import datetime, timedelta
+from functools import cmp_to_key
 
 import logging
 from functools import reduce
@@ -676,7 +677,7 @@ class IngestJobManager:
                     # filter out jad's from exclude_job_group_ids
                     job_admin_dicts = [jad for jad in job_admin_dicts if 'job_group_id' not in jad['job'] or jad['job']['job_group_id'] not in exclude_job_group_ids]
 
-                job_admin_dicts = sorted(job_admin_dicts, cmp=jad_compare_func)
+                job_admin_dicts = sorted(job_admin_dicts, key=cmp_to_key(jad_compare_func))
                 if job_admin_dicts:
                     logger.info('%s jobs with status %s waiting', len(job_admin_dicts), jobState2String(status))
                     return job_admin_dicts[0]