[JIRA] (OVIRT-2029) Add cache pre-seed functionality to JJB

Add cache pre-seed functionality to JJB --------------------------------------- Key: OVIRT-2029 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-2029 Project: oVirt - virtualization made easy Issue Type: Improvement Components: JJB Reporter: Barak Korren Assignee: infra Labels: upstream-contribution Since we run JJB from STDCI, we cannot have it rely on the existence of a persistent cache from its previous operation. Since JJB is most efficient when it has such a cache, our STDCI script generates such a cache for it from the contents of the previous commit. To do that we essentially had to implement parts of the JJB internals (The cache handling) on our own. It desirable to have an option in JJB that would do that instead.