Switch ironic-lib and python-ironicclient gates to IPA
Switch ironic-lib and python-ironicclient gates to IPA

Currently they are using the old deprecated ramdisk. Also stop building
the ramdisk in these jobs, as we have prebuilt IPA images.

Change-Id: Icc9a1d2b103e725a9f5384096998b0d0f2247a31

noorul/os-project-config,dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,noorul/os-project-config