Run redfish victoria job on focal

The ironic-standalone-redfish-victoria job is using latest tinyipa
based on tinycore 11.x, but still running on bionic.
That causes issues during the ipa-ramdisk build because of kernel
too old in bionic, so setting nodeset to focal.

Change-Id: Ia0fbc97184a4098635085edbdd6d7be5dfd2218c
1 file changed