jenkins-common.sh: add NO_LIST_OSMO_PACKAGESAllow to optionally skip listing the installed packages. This is usefulto speed up tests when running locally.Related: osmo-dev I3d9976d07f088e2d106d23259889a4bffe1abbcbChange-Id: Iaafb81e9ee94850ae3b6318574ad5370d74a2838