Modified system tests to take EOS eviction counter into account
Description
Added a new option to stage/evict the files N times, in order to test usage of the new attribute sys.retrieve.evict_counter.
For now, the default this value is set to 1. This will allow the script to work with the current CI (older EOS version) without failing. This value should be increased - at least to 2 - once a EOS version with eviction counter is deployed.
Testing
- Ran tests locally, with the new branch of EOS containing the eviction counter: https://gitlab.cern.ch/dss/eos/-/tree/CTA-1064
- Tests completed successfully in existing CI