Actually, if you just install and publish the CB Activity and CB Auto-Action plugins, the "Follow" and "Like" buttons will appear in GroupJive.
To install: go to Community Builder / Plugins Management / Install & Update then in left on "Community Builder plugins", then simply click "Install for CB Auto-actions and then on CB Activity. Check that they installed successfully on top of screen each time. Then click "Close" button at top, and search for them in the plugins management, and click on the "Published" X to become a green checkmark "√". CB auto-actions has all system auto-actions that will be processing those buttons.
You can then if you wish further configure details of CB Activity.
No need to touch CB Auto-Actions configuration.