Basically, osmo-build.sh holds logic to check whether the necessary
artifact is available. If so it fetches artifact, unpacks it and
triggers the actual build. In case the necessary artifact is not
available osmo-build.sh simply builds all dependencies from source
by using osmo-build-dep.sh and archives deps to the ARTIFACT_STORE
The necessary functions to determine the artifact name from remote and
local repositories as well as the handling of artifact files live in
osmo-artifacts.sh, which is sourced by osmo-build.sh.
osmo-build.sh will be sourced by the contrib/jenkins.sh build script
inside each git repository. This automatically triggers the build,
so one need to source at the end of each jenkins.sh script.
See jenkins-openBsc.sh  for more details.
Artifacts will be stored as follows:
Furthermore, ARTIFACT_STORE environment variable has to be set on all
jenkins slaves. The JOB_NAME variables is injected to each jenkins job