Fixed a couple linting issues with yamllint and ansible-review #111
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yamllint: "truthy value should be true or false"
(Docs: https://github.com/adrienverge/yamllint/blob/master/yamllint/rules/truthy.py)
ansible-review: "WARN: Best practice 'Use YAML format for tasks and handlers rather than key=value' not met"
(Docs: https://github.com/willthames/ansible-review/blob/2aacd7462f6a8a96165d9218122171b74de54b13/lib/ansiblereview/tasks.py)
ansible-review: "Shell should only be used when essential"
(Docs: https://github.com/willthames/ansible-review/blob/2aacd7462f6a8a96165d9218122171b74de54b13/lib/ansiblereview/examples/standards.py#L95)