prevent tags from causing redundant dependency errors

[trehn]

actions['wait_online_for_setup'] = {
    'triggered': True,
    'needed_by':   [
        'tag:setup.target',
    ],
}
actions['setup'] = {
    'preceded_by': [
        'action:wait_online_for_setup',
    ],
    'tags': [
        'setup.target',
    ],
}

results in

redundant dependency of action:setup in bundle 'foo' on action:wait_online_for_setup

[trehn]

fixed as of 76c7325