Moved all of the group_vars/all.yml file into its own variable file
This change was done to allow a user to override basic options
without having to modify the default group variable files. While
the group_vars/all.yml file is still present it is only holding the
revision information that is used for release data and the minimal
required kernel that allows the system to function using VXLAN.
The upgrade script was modified to support the new "default"
user_group_vars.yml file.
tempest_swift_enabled was set to true in group_vars, so this has
now been set as a default in the role instead.
Commit 1bd2bc052a implemented the
package URL update for rabbitmq, but not the corresponding sha256
update. This was not noticed due to group_vars overriding the URL
to a previous version, resulting in the above-mentioned commit
taking no effect. This patch therefore also corrects the sha256.
Closes-Bug: #1460516
Closes-Bug: #1460992
Change-Id: I8e42bb124827bb276134d662c9a171db8e4c017e
eb95036a7e