pkgtest: try to shutdown a previous runned LXC if found before start tests
pkgtest: try to shutdown a previous runned LXC if found before start tests

Former-commit-id: 26c7c0c098aca3046bbb6071fe2f906313e56518
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine