Add coverage post job to ironic-lib
Add coverage post job to ironic-lib

Also move 'post' section to underneath 'gate' for ironic jobs.

Depends-On: I30a810effd918b8cb88485a527ecbfbc01dfb2e1
Change-Id: I9ee70ee6fff03ef751ffe58cd367a22dcea099fe

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