[FIXED JENKINS-18678] - Update builds location in RunMap after the job's renaming
This change resolve the issue with missing builds after the jobs renaming and further cleanup of cache.
Finally, the cache's directory location will be updated after the each job renaming.
https://issues.jenkins-ci.org/browse/JENKINS-18678

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
[JENKINS-18678] Reproduced problem in test.
Merge branch 'synopsys-arc-oss-jenkins_18678_job_renaming_fix'
[JENKINS-18678] Tweaking API, adding @since & changelog for #1075, fixing purgeCache so that test can pass.