Comment 0 for bug 1824368

Description of problem:
=======================

In stable/queens, we break since we don't feed ansible with any value.

We don't support or ship an Amphora image that is non-x86_64. The purpose of specifying the arch is (as stated here[1]) to hint the Nova scheduler which compute nodes to take into account when it schedules an Amphora instance.

[1] Ia7be6503a40e08d0d1f7f4d89132c9e9b5bd6704