* yum module properly check for None config_file (#46641)
* yum module properly check for None config_file
* add conf_file test cases to yum integration tests
Signed-off-by: Adam Miller <admiller@redhat.com>
(cherry picked from commit fb6e91bf98)
* add changelog for 2.7 backport
Signed-off-by: Adam Miller <admiller@redhat.com>