Revert some changes in the packger since venv is broken with our python
Revert some changes in the packger since venv is broken with our python


Former-commit-id: 763c2e7b6113032a3cd2f042bc5e9f8983f35c87
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine