Workarounds for failing tests in master
Mostly suppress fluctuating output from tests. Related to LHCb#151 (closed)
- Update refs from lhcb-master/1885
- use_temp_dir for all tests
- Ignore DstData and event size counters
- Ignore checksums for photons
- Suppress stderr output in clang builds
- Fix test_persistreco_output_realtime for v3 (started failing with !1837 (merged))
Edited by Rosen Matev