[Rally] installation from git requires newer oslo packages
[Rally] installation from git requires newer oslo packages

Latest rally requires newer oslo.utils and oslo.i18n package than
currently available in default virtenv on RHEL7.5. Let's workaround
it by installing latest.

Change-Id: I210ab8e3c6c41b90a7a39f3cf7bb7b7efc0af163

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared