Create the signing01.ci.openstack.org job node and puppet the
signing subkey onto it via pubring.gpg and secring.gpg files stored
in private hiera. Also set up some basic configuration and packages
on the management bastion to aid in key management/rotation, and add
the beginnings of administrative documentation for this.
Change-Id: Iecddb778994a38f7898e0c20e7f3f8e93f0a7f60
Depends-On: I70c3b82185681ee64791cda653360c26a93bd466
Story: #2000336
Signed-off-by: Jeremy Stanley <fungi@yuggoth.org>