Pin Ansible Galaxy dependencies

Currently kayobe's ansible galaxy dependencies are unpinned. For
versioned roles, any new release will be picked up. For unversioned
roles, any new commit to master will be picked up. This is clearly not
ideal for stability, and we should pin these dependencies to specific
versions to avoid things changing under our feet. For unversioned roles,
we may want to consider adding versioning where we have the power to do
so.

Change-Id: Ib83a0d95b9061b3a57cb0e7c4cff3488ee076664
Story: 2003437
Task: 24633

doc/source/development/development.rst

@@ -0,0 +1,22 @@
+===========
+Development
+===========
+
+Ansible Galaxy
+==============
+
+Kayobe uses a number of Ansible roles hosted on Ansible Galaxy. The role
+dependencies are tracked in ``requirements.yml``, and specify required
+versions. The process for changing a Galaxy role is as follows:
+
+#. If required, develop changes for the role. This may be done outside of
+   Kayobe, or by modifying the role in place during development. If upstream
+   changes to the role have already been made, this step can be skipped.
+#. Commit changes to the role, typically via a Github pull request.
+#. Request that a tagged release of the role be made, or make one if you have
+   the necessary privileges.
+#. Ensure that automatic imports are configured for the role using e.g. a
+   TravisCI webhook notification, or perform a manual import of the role on
+   Ansible Galaxy.
+#. Modify the version in ``requirements.yml`` to match the new release of the
+   role.

doc/source/development/index.rst

@@ -8,5 +8,6 @@ Kayobe Development Guide
    vagrant
    manual
    automated
+   development
    testing
    contributing

requirements.yml

@@ -1,25 +1,44 @@
 ---
 - src: ahuffman.resolv
+  version: v1.2
 - src: jriguera.configdrive
+  # There are no versioned releases of this role.
+  version: 6b5f1d55bc3f27fa2855d8dd59b5c224d160d806
 - src: MichaelRigart.interfaces
+  version: v1.1.0
 - src: mrlesmithjr.manage-lvm
+  version: v0.1.1
 - src: resmo.ntp
-#- src: singleplatform-eng.users
-- src: https://github.com/stackhpc/ansible-users
-  version: append
-  name: singleplatform-eng.users
+  version: 0.4.0
+- src: singleplatform-eng.users
+  version: v1.2.5
 - src: stackhpc.dell-powerconnect-switch
+  version: v1.0.0
 - src: stackhpc.drac
+  version: 1.1.4
 - src: stackhpc.drac-facts
+  version: 1.0.0
 - src: stackhpc.grafana-conf
+  version: 1.0
 - src: stackhpc.libvirt-host
+  version: v1.1.0
 - src: stackhpc.libvirt-vm
+  version: v1.1.0
 - src: stackhpc.mellanox-switch
+  version: v1.0.0
 - src: stackhpc.os-flavors
+  version: v1.0.0
 - src: stackhpc.os-images
+  version: v1.0.0
 - src: stackhpc.os-ironic-state
+  version: v1.0.0
 - src: stackhpc.os-networks
+  version: v1.0.0
 - src: stackhpc.os-openstackclient
+  version: v1.2.0
 - src: stackhpc.os-projects
+  version: v1.1.2
 - src: stackhpc.os-shade
+  version: v1.2.0
 - src: yatesr.timezone
+  version: 1.1.0