CondCore unit tests failing for PY3 IBs due to use of boost_python

[smuzaffar]

@ggovi , many CodeCore unit tests are failing in PY3 IBs with error like [a]. Problem is that in PY3 IBs , the default python is python3 which these unit tests are linked to boost_python which was build against python2. In past we have avoided such issues by replacing boost_python with pybind11. Can you please look in to these tests and use PyBind11 instead of boost_python?

[a]

===== Test "testAlCaRecoTriggerBitsPayloadInspector" ====
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
ImportError: No module named site

---> test testAlCaRecoTriggerBitsPayloadInspector had ERRORS
 
^^^^ End Test testAlCaRecoTriggerBitsPayloadInspector ^^^^

[smuzaffar]

assign db

[cmsbuild]

A new Issue was created by @smuzaffar Malik Shahzad Muzaffar.

@Dr15Jones, @silviodonato, @dpiparo, @smuzaffar, @makortel can you please review it and eventually sign/assign? Thanks.

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[cmsbuild]

New categories assigned: db

@ggovi you have been requested to review this Pull request/Issue and eventually sign? Thanks

[mmusich]

I think this issue is caused by the integration of PR #29622.
In PR #29993 I address the issue in a similar fashion as done PR #28842 which was fixing issue #28837.
Probably PyBind11 is the best solution though I suspect that needs a more thorough re-thinking of the payload inspector code. My solution at least will remove the unit test failures.

[smuzaffar]

thanks @mmusich , can you please also proivde the fix for CondCore/Utilities : https://cmssdt.cern.ch/SDT/cgi-bin/logreader/slc7_amd64_gcc820/CMSSW_11_2_PY3_X_2020-05-27-2300/unitTestLogs/CondCore/Utilities#/

[mmusich]

@smuzaffar see #30008

[smuzaffar]

thanks @mmusich