Changes to BW test options files to go with PRConfig!349

Goes with lhcb-datapkg/PRConfig!349 (merged) (and ideally lhcb-core/LHCbPR2HD!260 (merged))

See PRConfig MR for full description. Here the changes are:

• Remove 2 now-unnecessary options files,
• Don't hard-code paths to files; use a helper struct
• Some small refactoring (e.g. removing unnecessary loops)

Hlt/Hlt2Conf/tests/options/bandwidth/hlt2_bandwidth_production_streams.py

@@ -17,14 +17,14 @@ from RecoConf.hlt2_global_reco import make_fastest_reconstruction
 from Hlt2Conf.settings.hlt2_pp_commissioning import _make_streams
 import re
 import json
+from PRConfig.bandwidth_helpers import FileNameHelper
 
-import os
-if not os.path.exists('tmp/MDF'): os.system('mkdir -p tmp/MDF')
-if not os.path.exists('tmp/Output'): os.system('mkdir -p tmp/Output')
-
-options.output_file = 'tmp/MDF/baseline-production-{stream}.mdf'
+fname_helper = FileNameHelper(process="hlt2")
+fname_helper.make_tmp_dirs()
+options.output_file = fname_helper.mdf_fname_for_Moore(
+    stream_config="production")
 options.output_type = 'MDF'
-options.output_manifest_file = 'tmp/MDF/baseline-production-streams.tck.json'
+options.output_manifest_file = fname_helper.tck(stream_config="production")
 
 to_remove = [
     'Hlt2Lumi',
@@ -86,7 +86,9 @@ def make_module_streams():
                 linedict.update({stream: filtered})  # Modify dictionary
 
     # Write out stream configuration to JSON file for use later in the test
-    with open('tmp/Output/hlt2-production-stream-config.json', 'w') as f:
+    with open(
+            fname_helper.stream_config_json_path(stream_config="production"),
+            'w') as f:
         json.dump({k: [line.name for line in v]
                    for k, v in linedict.items()}, f)