Merge branch 'sponce_fixtest' into 'master'

fixing set of warnings ignored in test_hlt2_and_spruce_bandwidth

See merge request !4511

Hlt/Hlt2Conf/tests/qmtest/test_hlt2_and_spruce_bandwidth.qmt

@@ -27,6 +27,7 @@ _remove_known_warnings = remove_known_warnings + LineSkipper([
     "WARNING Lifetime fit did not converge. Aborting.",
     "WARNING Negative variance produced in lifetime fit iteration.",
     "WARNING Empty Buffers -- presumably DstData bank has no payload",
+    "WARNING Suppressing message: 'Empty Buffers -- presumably DstData bank has no payload'",
     "WARNING Suppressing message: 'Misordered channel'",
     "WARNING DstData raw bank seems to only contain a header, no other data",
     "WARNING No HltPackedData raw bank (the DstData bank) in raw event."