Fix yum repo-pkgs <blah> install exist-other-repo.
Add override_install_langs configuration, for container install needs.
Install yumdb keys for install_langs and tsflags values.
Add _writeRawConfigFile() so we can change yum.conf values.
Add fs sub-command and docs. Mostly for small installroot creation.
Optimize pkg.verify() for "fs du" and "fs refilter".
Add the fs status/diff commands.
 ppc64le is its own arch treat it as such.

 ppc64le is ppc64 little endian, it is a completely incompatable arch
to all other 64 bit power builds and can not be multilibbed with ppc.
While it works okay in the default Fedora setup its because Fedora
patches _ppc64_native_is_best to True as soon as its False you get
unexpected results.
 This patch covers things in both setups and makes it clear how it
works.

Signed-off-by: Dennis Gilmore <dennis@ausil.us>
Move exactarchlist_default to ditro. variable.
Add override_install_langs to test.FakeConf.
Auto-enable repos. that contain packages we need in fs diff.
Cleanup tmpdir for fs diff.
Fix update-minimal traceback (#1048584) and ignoring updates.