Merge remote-tracking branch 'origin/master' into ssi_ar_ls

...ker/ctafrontend/cc7/etc/yum/pluginconf.d/versionlock.list

...egration/docker/ctafrontend/cc7/opt/run/bin/ctaeos-mgm.sh

...cker/ctafrontend/cc7/opt/run/bin/eos_configure_preprod.sh

...inuousintegration/orchestration/tests/archive_retrieve.sh

continuousintegration/orchestration/tests/client_ar.sh

...inuousintegration/orchestration/tests/simple_client_ar.sh

objectstore/BackendFactory.cpp

objectstore/BackendFactory.hpp

objectstore/BackendRados.cpp

objectstore/BackendRados.hpp

objectstore/cta-objectstore-collect-orphaned-object.cpp

objectstore/cta-objectstore-dereference-removed-queues.cpp

objectstore/cta-objectstore-dump-object.cpp

objectstore/cta-objectstore-initialize.cpp

objectstore/cta-objectstore-list.cpp

objectstore/cta-objectstore-unfollow-agent.cpp

scheduler/OStoreDB/OStoreDB.cpp

scheduler/OStoreDB/OStoreDBFactory.hpp

scheduler/Scheduler.cpp

scheduler/Scheduler.hpp