Reflect elfutils upstream commit e939590219 (PR25502) changing the
location of the client cache. Without this update the first run of
the testcase works, but not the subsequent runs.
Find new home for downstream RHEL tests. Upstream them. The set of
tests used for fedora gating stays intact: The gating tests are only
those having the tier1 tag set in their main.fmf file. The testplan
plans/ci.fmf filters the others out from gating.
The set of Fedora gating tests stays the same as it was before this
change.