PROCTools: Start running q-tests in AthenaMT mode w/ a single thread in RunTier0Tests.py
As discussed in ATLASRECTS-6413, with this MR we switch to running the standard q-tests in AthenaMT mode w/ a single thread in RunTier0Tests.py
. I didn't touch the overlay/simulation tests.
While at it I cleaned up some obsolete CMT
-era stuff and fixed the bug that causes:
/cvmfs/sft.cern.ch/lcg/releases/LCG_100_ATLAS_4/Python/3.8.6/x86_64-centos7-gcc8-opt/lib/python3.8/subprocess.py:844: RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used
self.stdout = io.open(c2pread, 'rb', bufsize)