Add an inOrder helper
Add an inOrder helper

The inOrder helper is better than gomock.InOrder in that it allows
nesting and creation of helper functions without losing the ordering
expectations: a helper using inOrder can be included in another call
to inOrder.

No user exists right now.

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

kubernetes-incubator/ocid,mikebrow/cri-o,nalind/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/cri-o,mikebrow/cri-o,mikebrow/cri-o,mikebrow/cri-o,kubernetes-incubator/ocid,nalind/cri-o,nalind/cri-o,kubernetes-incubator/cri-o