Inventory: add buildhw_stg group vars and make sure it's in stg group

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

inventory/group_vars/buildhw_stg

@@ -0,0 +1,22 @@
+---
+# These variables are pushed into /etc/system_identification by the base role.
+# Groups and individual hosts should ovveride them with specific info.
+
+docker_registry: "candidate-registry.stg.fedoraproject.org"
+freezes: false
+host_group: kojibuilder
+koji_hub: "koji.stg.fedoraproject.org/kojihub"
+koji_hub_nfs: "fedora_koji"
+koji_instance: "primary"
+koji_root: "koji.stg.fedoraproject.org/koji"
+koji_server_url: "https://koji.stg.fedoraproject.org/kojihub"
+koji_topurl: "https://kojipkgs.stg.fedoraproject.org/"
+koji_weburl: "https://koji.stg.fedoraproject.org/koji"
+source_registry: "registry.stg.fedoraproject.org"
+
+notes: |
+  Koji service employs a set of machines to build packages for the Fedora project.
+
+  * Relies on koji-hub, Packages, PkgDB, apache, fedora messaging, fas, virthost, and is monitored by nagios
+  * Several services rely on the builders, including koschei, Bodhi, Tagger, SCM, Darkserver.
+  * Produces automated builds of packages for the architecture listed. Builders can be scaled by adding new

inventory/inventory

@@ -1078,6 +1078,7 @@ wiki_rdu3
 [rdu3_staging:children]
 bodhi_backend_stg_rdu3
 buildvm_stg_rdu3
+buildhw_stg_rdu3
 buildvm_ppc64le_stg_rdu3
 buildvm_aarch64_stg_rdu3
 buildvmhost_stg_rdu3