- updated _build_jar_step method signature
- set proper name for jar step
- handle lg_step_num_mapping passed to _fetch_counters is empty list
Merge remote-tracking branch 'ap-ensighten/bug/non.streaming.jar' into fix_fetch_counters
Fix counter fetching when non streaming jars are interleaved with streaming jars
Merge pull request #645 from sudarshang/fix_fetch_counters

Fix crashes when non-streaming jars are used